Safety data sheet documentation for vanillin (CAS 121-33-5), compiled to REACH Annex II. Vanillin has no harmonised entry in CLP Annex VI; the sheet states its classification basis (aggregated ECHA C&L notifications). Two options: a working draft sent by e-mail immediately, or a signed card issued within 72 hours of complete input. The item supplied is a document — MolGod.org does not sell, supply or ship chemical substances.
Free, and generated automatically from the sources listed on this page. No person has reviewed it, and it describes the substance in general — not your material, your process or your intended market.
Section 9 — physicochemical properties: 10 of 22 established.
We show what is established and name what is not. Classification and identity are complete on every card; section 9 is where public data is thin.
Identity, structure, physical and chemical properties, analytical data and the literature — every value with the source it came from and the date that source was read. The full record is in the data sections further down this page.
Identity CAS · EC · IUPAC · synonyms · molecular formula · molecular weight
Structure 2D · 3D · SMILES · InChI · InChIKey
Physical melting point · boiling point · density · vapour pressure · solubility
Chemical reactivity · stability · incompatible materials
Analytical spectra and methods where available
References literature, with DOI where a DOI exists
Identifier coverage is shown as a count, not as a quality rating. It tells you how well characterised this substance is in public data — which is a different question from how good it is, and a more useful one when you are deciding whether the documentation behind it can be defended.
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€49.99Working draftThe complete sixteen-section document, referenced, downloadable immediately after checkout. The right choice while the paperwork is still moving.
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Documentation available for this substance: safety data sheet · CLP label · certificate of analysis on request · specification. Languages: the official language of your destination market, produced per card.
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Classification harmonised entry with index number where one exists; self-classification shown separately and labelled, never merged
Hazard statements the official text, in the page language
Precautionary statements combined statements reproduced whole, never split
Pictograms and signal word
Inventory status per jurisdiction, each stated individually
Restrictions entry and scope where one applies
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Document status revision date and the amendment in force when issued
Fields with no established status say so. This page never states that no restrictions apply — absence from a dataset is not clearance, and a document that treats it as clearance is the most dangerous kind of document in this field.
A digital PDF safety data sheet in the sixteen-section structure of REACH Annex II (Regulation 1907/2006).
Substance identification, hazard classification, physicochemical, toxicological and ecological information, and regulatory references.
Classification read against the harmonised entry in CLP Annex VI where one exists for the substance.
A version number, a compilation date, and the source behind each value that carries one.
Delivery by e-mail. Nothing is shipped.
What this is not
Not a chemical substance, not a sample, not any physical goods.
Not a certification. No official certification scheme for safety data sheets exists in the European Union.
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Not a substitute for your own regulatory assessment, nor for the safety data sheet supplied by the manufacturer or importer of the substance you actually hold.
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Where the available evidence does not support a value, the sheet states that the value is not established rather than estimating one. A field with no recorded source is marked as such.
What is in the buyer pack
Everything your compliance officer will ask for, in one file.
The product page as PDF — the record as published, so what you forward matches what you read.
The safety data sheet at your entitlement level — sixteen sections in the order set by REACH Annex II, for this substance, in the language you select.
The CLP label artwork — generated from the same classification as the sheet, so the two cannot disagree.
The specification, and the certificate of analysis where batch data exists.
sources.txt — every citation with the date it was read.
An explicit list of what we could not establish — fields marked unavailable rather than filled with an estimate. This is the honest part of the document and we do not hide it in a footnote.
Your European buyer is going to forward this to somebody who was not on the call. The pack exists so that what they forward is complete, self-explanatory and traceable — rather than four attachments and a sentence beginning “I think this is everything”.
These switch the language of this page. Single substances. Mixtures on enquiry. One document, one language — additional languages are priced separately. Every version, including the Chinese one, is written to EU law — (EC) No 1907/2006 (REACH) Annex II and (EU) 2020/878 — and translated from it. The Chinese version is a reference translation, not a legally valid document for the Chinese market: an SDS for China must be compiled separately to GB/T 16483 and GB/T 17519.
3D model Vanillin, CAS 121-33-5, molecular formula C8H8O3, molar mass 152.15 g/mol
Data transcribed from regulatory registers and technical literature, with the source and edition stated. It does not replace the supplier's safety data sheet. Fields without a recorded source are marked as such.
📊 Physicochemical data — CAS 121-33-5
📊Physicochemical properties
Quick Reference
Formula:C8H8O3
MW:152.15 g/mol
CAS:121-33-5
🔬 Advanced Properties
Chemical Identifiers
SMILES:COC1=C(C=CC(=C1)C=O)O
Last updated: 2026-10-07
📐Physical & Chemical Properties (DB)
5 fields MolGod Score: No source
NIST. Chemistry WebBook, SRD 69. National Institute of Standards and Technology. ↗
dotyczy: Melting point
PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗
dotyczy: Melting point · Boiling point · Density (ρ)
NLM. Hazardous Substances Data Bank (HSDB). National Library of Medicine. ↗
dotyczy: Boiling point
Sangster, J. "Octanol-Water Partition Coefficients of Simple Organic Compounds." Journal of Physical and Chemical Reference Data 18, no. 3 (1989): 1111-1229. ↗
dotyczy: logP (octanol/water)
Physicochemical values are derived from the independent, peer-reviewed sources listed above.
PubChem. National Center for Biotechnology Information (NIH/NLM), chemical compound database. ↗
dotyczy: Molecular formula · Molecular weight · Melting point · Boiling point · Density · LogP (lipophilicity) · IUPAC name · SMILES · InChIKey
NIST. Chemistry WebBook, SRD 69. National Institute of Standards and Technology. ↗
dotyczy: Melting point
NLM. Hazardous Substances Data Bank (HSDB). National Library of Medicine. ↗
dotyczy: Boiling point
Kamaly NA, Kamel AS, Sadik NA et al.. (2025). "Milnacipran and Vanillin Alleviate Fibromyalgia-Associated Depression in Reserpine-Induced Rat Model: Role of Wnt/β-Catenin Signaling.". Molecular neurob
Santos LDF, Lautru S, Pernodet JL. (2024). "Genetic Engineering Approaches for the Microbial Production of Vanillin.". Biomolecules. https://doi.org/10.3390/biom14111413
Stoff H. (2024). "Paulina S. Gennermann 2023: Eine Geschichte mit Geschmack. Die Natur synthetischer Aromastoffe im 20. Jahrhundert am Beispiel Vanillin und Lisa Haushofer 2022: Wonder Foods: The Scie
Liu Y, Sun L, Huo YX et al.. (2023). "Strategies for improving the production of bio-based vanillin.". Microbial cell factories. https://doi.org/10.1186/s12934-023-02144-9
Ma Q, Liu L, Zhao S et al.. (2022). "Biosynthesis of vanillin by different microorganisms: a review.". World journal of microbiology & biotechnology. https://doi.org/10.1007/s11274-022-03228-1
Rakoczy K, Szlasa W, Saczko J et al.. (2021). "Therapeutic role of vanillin receptors in cancer.". Advances in clinical and experimental medicine : official organ Wroclaw Medical University. https://d
MOLECULE
Per-CAS bibliography (live from 13+ databases)
Sources: db:pubmed (9)
db:pubmed
Zhang M, Subramaniyan S, Hakkarainen M. (2025). "Divanillin Cross-Linked Recyclable Cellulose Networks.". Macromolecular rapid communications. https://doi.org/10.1002/marc.202401094 →
db:pubmed
Kamaly NA, Kamel AS, Sadik NA et al.. (2025). "Milnacipran and Vanillin Alleviate Fibromyalgia-Associated Depression in Reserpine-Induced Rat Model: Role of Wnt/β-Catenin Signaling.". Molecular neurobiology. https://doi.org/10.1007/s12035-025-04723-w →
db:pubmed
Abdelghafour AM, Mahrous M, Zaher ME. (2025). "Vanillin alleviates oxidative stress-mediated neuronal pyroptosis induced in rats by isoproterenol via SIRT1/NOX4/ROS/TXNIP/NLRP3 signaling pathway.". Food & function. https://doi.org/10.1039/d4fo06458e →
db:pubmed
Santos LDF, Lautru S, Pernodet JL. (2024). "Genetic Engineering Approaches for the Microbial Production of Vanillin.". Biomolecules. https://doi.org/10.3390/biom14111413 →
db:pubmed
Stoff H. (2024). "Paulina S. Gennermann 2023: Eine Geschichte mit Geschmack. Die Natur synthetischer Aromastoffe im 20. Jahrhundert am Beispiel Vanillin und Lisa Haushofer 2022: Wonder Foods: The Science and Commerce of Nutrition.". NTM. https://doi.org/10.1007/s00048-024-00384-3 →
db:pubmed
Liu Y, Sun L, Huo YX et al.. (2023). "Strategies for improving the production of bio-based vanillin.". Microbial cell factories. https://doi.org/10.1186/s12934-023-02144-9 →
db:pubmed
Ma Q, Liu L, Zhao S et al.. (2022). "Biosynthesis of vanillin by different microorganisms: a review.". World journal of microbiology & biotechnology. https://doi.org/10.1007/s11274-022-03228-1 →
db:pubmed
Rakoczy K, Szlasa W, Saczko J et al.. (2021). "Therapeutic role of vanillin receptors in cancer.". Advances in clinical and experimental medicine : official organ Wroclaw Medical University. https://doi.org/10.17219/acem/139398 →
This substance is subject to regulatory requirements: hazardous waste management (BDO — national rule, Poland). Details in the \"Regulatory Status (REACH/ECHA/CLP)\" section and on the SDS. Regulatory information — does not restrict purchase in this store.
🧮 Stoichiometry Calculator
🧪 Chemical Data
CAS Number
121-33-5
Molecular formula
C8H8O3
Molar mass
152.15 g/mol
IUPAC name (EN)
4-hydroxy-3-methoxybenzaldehyde
SMILES
COC1=C(C=CC(=C1)C=O)O
InChIKey
MWOOGOJBHIARFG-UHFFFAOYSA-N
📡 Data sources
The data in this widget comes from the following verified scientific sources:
PubChem — National Center for Biotechnology Information (NCBI/NIH), USA
ChEMBL — European Bioinformatics Institute (EMBL-EBI), UK
NIST WebBook — National Institute of Standards and Technology, USA
Data is cached locally for speed — the widget also works offline.
⚗️ Physicochemical properties
Temp. topnienia
82
Density
1.056
Source: PubChem, NIST WebBook. Last updated: 2026-10-07
★☆☆☆☆OPENLIBRARY🔓 OPENWilliam Shober Seese. 1965. "The synthesis of substituted o̲-vanillins."link[accessed: 2026-10-07]CC0 (metadata)
📡 Spectroscopy — CAS 121-33-5
NMR spectroscopy — source records
Earlier NMR results on this page remain available: Live Spectra (NMRShiftDB card).
Structure identity: MWOOGOJBHIARFG-UHFFFAOYSA-N
For each record: MolGod’s status line, then the source record (as retrieved by MolGod), then MolGod’s own checks.
Experimental NMR
¹H NMR
¹H NMR — Experimental (measured); conditions reported by the source: solvent, temperature, spectrometer frequency — nmrshiftdb2:spectrum:80128625
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
9.341
H4
not reported by the source
exact
7.294
H2
not reported by the source
exact
7.178
H1
not reported by the source
exact
6.685
H3
not reported by the source
exact
3.706
H5 H6 H7
not reported by the source
group
Source
nmrshiftdb2
Spectrum ID
80128625
Solvent
Deuteriumoxide (D2O)
Temperature (K)
298
Frequency (MHz)
500
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 4, group 1
¹H NMR — Experimental (measured); conditions reported by the source: solvent, temperature, spectrometer frequency — nmrshiftdb2:spectrum:80129095
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
9.772
H4
not reported by the source
exact
7.42
H2
not reported by the source
exact
7.388
H1
not reported by the source
exact
6.961
H3
not reported by the source
exact
3.841
H5 H6 H7
not reported by the source
group
Source
nmrshiftdb2
Spectrum ID
80129095
Solvent
DMSO
Temperature (K)
298
Frequency (MHz)
500
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 4, group 1
¹³C NMR
¹³C NMR — Experimental (measured); conditions reported by the source: solvent, temperature, spectrometer frequency — nmrshiftdb2:spectrum:20199442
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
57.1
C8
Q
exact
112.4
C3
D
exact
117.0
C6
D
exact
127.4
C5
D
exact
130.4
C2
S
exact
149.7
C1
S
exact
154.6
C4
S
exact
192.2
C7
D
exact
Source
nmrshiftdb2
Spectrum ID
20199442
Solvent
Dimethylsulphoxide-D6 (DMSO-D6, C2D6SO)
Temperature (K)
298
Frequency (MHz)
23
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 8
¹³C NMR — Experimental (measured); conditions reported by the source: solvent, temperature, spectrometer frequency — nmrshiftdb2:spectrum:80128626
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
193.096
C7
D
exact
159.51
C4
S
exact
149.127
C1
S
exact
129.017
C5
D
exact
124.84
C2
S
exact
116.207
C6
D
exact
109.803
C3
D
exact
54.967
C8
Q
exact
Source
nmrshiftdb2
Spectrum ID
80128626
Solvent
Deuteriumoxide (D2O)
Temperature (K)
298
Frequency (MHz)
500
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 8
¹³C NMR — Experimental (measured); conditions reported by the source: solvent, temperature, spectrometer frequency — nmrshiftdb2:spectrum:80129096
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
191.009
C7
D
exact
153.029
C4
S
exact
148.155
C1
S
exact
128.701
C2
S
exact
126.092
C5
D
exact
115.383
C6
D
exact
110.653
C3
D
exact
55.574
C8
Q
exact
Source
nmrshiftdb2
Spectrum ID
80129096
Solvent
DMSO
Temperature (K)
298
Frequency (MHz)
500
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 8
NMR deposited as experimental — measurement details incomplete
The source lists these spectra as experimental but does not report all measurement details; each spectrum states what is missing. Chemical shifts below come from the source record and are not reconstructed.
¹³C NMR
¹³C NMR — Deposited as experimental; the source reports no measurement details (solvent, temperature, spectrometer frequency not reported) — nmrshiftdb2:spectrum:10042837
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
56.45
C8
Q
exact
110.15
C3
D
exact
115.55
C6
D
exact
128.2
C5
D
exact
130.55
C2
S
exact
148.5
C1
S
exact
153.14
C4
S
exact
192.5
C7
D
exact
Source
nmrshiftdb2
Spectrum ID
10042837
Solvent
not reported by the source
Temperature (K)
not reported by the source
Frequency (MHz)
not reported by the source
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 8
¹³C NMR — Deposited as experimental; the source reports no measurement details (solvent, temperature, spectrometer frequency not reported) — nmrshiftdb2:spectrum:20088909
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
56.1
C8
Q
exact
108.9
C3
D
exact
114.5
C6
D
exact
127.6
C5
D
exact
129.7
C2
S
exact
147.3
C1
S
exact
151.8
C4
S
exact
191.0
C7
D
exact
Source
nmrshiftdb2
Spectrum ID
20088909
Solvent
not reported by the source
Temperature (K)
not reported by the source
Frequency (MHz)
not reported by the source
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
experimental candidate by rule NMR-MEASCALC-1
Assignments
exact 8
Calculated / predicted NMR — not experimental measurements
Values below are calculated, not measured.
¹³C NMR
¹³C NMR — Predicted by ACD/Labs C+H NMR Predictors and DB, 2020.1.0 (calculated, not measured) — nmrshiftdb2:spectrum:60021186
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
56.04
C8
Q
exact
148.08
C1
S
exact
109.97
C3
D
exact
129.88
C2
S
exact
191.2
C7
D
exact
127.09
C5
D
exact
115.27
C6
D
exact
152.7
C4
S
exact
Source
nmrshiftdb2
Spectrum ID
60021186
Solvent
not reported by the source
Temperature (K)
not reported by the source
Frequency (MHz)
not reported by the source
Publication
not reported by the source
Method
Source method: ACD/Labs C+H NMR Predictors and DB, 2020.1.0 (calculated)
Retrieved
2026-10-03T05:23:30Z
MolGod verification
calculated (prediction) by rule NMR-MEASCALC-1
Assignments
exact 8
¹³C NMR — Predicted by HOSE code using nmrshiftdb2 data (calculated, not measured) — nmrshiftdb2:spectrum:70148281
δ (ppm)
Assignment (atoms)
Multiplicity
Assignment quality
57.1
C8
Q
exact
149.7
C1
S
exact
112.4
C3
D
exact
130.4
C2
S
exact
192.2
C7
D
exact
127.4
C5
D
exact
117.0
C6
D
exact
154.6
C4
S
exact
Source
nmrshiftdb2
Spectrum ID
70148281
Solvent
not reported by the source
Temperature (K)
not reported by the source
Frequency (MHz)
not reported by the source
Publication
not reported by the source
Method
Source method: HOSE code using nmrshiftdb2 data (calculated)
Retrieved
2026-10-03T05:23:30Z
MolGod verification
calculated (prediction) by rule NMR-MEASCALC-1
Assignments
exact 8
Values withheld at gate DATA_QUALITY — measurement type could not be classified.
Source
nmrshiftdb2
Spectrum ID
60005858
Solvent
Deuteriumoxide (D2O)
Temperature (K)
298
Frequency (MHz)
31.25
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
unknown
Assignments
exact 4, group 1
Values withheld at gate DATA_QUALITY — measurement type could not be classified.
Source
nmrshiftdb2
Spectrum ID
60005856
Solvent
Deuteriumoxide (D2O)
Temperature (K)
298
Frequency (MHz)
31.25
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
unknown
Assignments
exact 8
Values withheld at gate DATA_QUALITY — measurement type could not be classified.
Source
nmrshiftdb2
Spectrum ID
60006781
Solvent
Chloroform-D1 (CDCl3)
Temperature (K)
294
Frequency (MHz)
150.0
Publication
not reported by the source
Method
Source measurement type: not declared
Retrieved
2026-10-03T05:23:30Z
MolGod verification
unknown
Assignments
exact 8
Symmetry-equivalent atom groups (MolGod, from the three-dimensional structure)
Spectra are fetched on demand from 9 sources. Each spectrum is stored in our database — the next time it is opened there are zero requests to the external API. Download JCAMP-DX / CSV / PNG for every spectrum without searching.
Type of data: Type of data not reported by the source (may be measured or calculated) Basis: these values match NMRShiftDB record nmrshiftdb2:60005858; type as classified by MolGod from that record.
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🔗 Source
About the downloads (Type of data: Type of data not reported by the source (may be measured or calculated)) JCAMP: the NMRShiftDB file as received (JCAMP-DX 5.01 text). It is a peak list: chemical shift in ppm. MolGod adds header lines stating the type of data; the values are unchanged. CSV: the same peak list in two columns. The second column repeats the shift value; it is not a signal intensity. Lines starting with # state the type of data. PNG: a picture of the plot above, with the type of data written on it. Use: where signals are expected or were reported (chemical shift positions). Not included or guaranteed: intensities, multiplicities, coupling constants, line shapes, and solvent or temperature unless stated. A predicted list is not a measurement and cannot serve as a reference spectrum for identity or purity testing. Downloads become active after Show.
Data is fetched once (JCAMP-DX parser) and stored in the plugin's local database. No duplicate downloads, no NIST queries on subsequent openings. Licences respected (only a deep link plus our own visualisation is published).
Data retrieved live from multiple sources (priority chain). JCAMP-DX / CSV / PNG available for download under each spectrum.
IR — Fourier-transform infrared
Loading IR — Fourier-transform infrared…
MS — Mass spectrometry (EI 70eV)
Loading MS — Mass spectrometry (EI 70eV)…
🔎 Spectrum Search (JCAMP-DX)
Upload a JCAMP-DX file (.jdx, .dx, .jcm) — the system will calculate the cosine similarity against all spectra in the database and display the TOP 10 matches.
📚 Bibliography (Chicago)
McLafferty, Fred W., ed. 2018. Wiley Registry of Mass Spectral Data. 11th ed. Hoboken, NJ: Wiley. A reference MS library (~775k spectra).
Stein, Stephen E., and Donald R. Scott. 1994. "Optimization and Testing of Mass Spectral Library Search Algorithms for Compound Identification." Journal of the American Society for Mass Spectrometry 5 (9): 859–866. The cosine + dot-product algorithm of NIST MS Search.
McDonald, Robert S., and Paul A. Wilks Jr. 1988. "JCAMP-DX: A Standard Form for Exchange of Infrared Spectra in Computer Readable Form." Applied Spectroscopy 42 (1): 151–162. The JCAMP-DX specification (extended to 5.01 for NMR/MS).
McLafferty, Fred W., and František Tureček. 1993. "Interpretation of Mass Spectra." 4th ed. Mill Valley, CA: University Science Books. Cosine-similarity matching and MS fragmentation — the foundation of the search algorithm.
Sumner, Lloyd W., Alexander Amberg, Dave Barrett, Michael H. Beale, Richard Beger, Clare A. Daykin, Teresa W.-M. Fan, et al. 2007. "Proposed Minimum Reporting Standards for Chemical Analysis." Metabolomics 3 (3): 211–221. MSI Level 1-4 — confidence-level standards for spectral matching.
Stein, Stephen E. 1999. "An Integrated Method for Spectrum Extraction and Compound Identification from Gas Chromatography/Mass Spectrometry Data." Journal of the American Society for Mass Spectrometry 10 (8): 770–781. The AMDIS algorithm — deconvolution + library match (NIST).
Lindon, John C., George E. Tranter, and David W. Koppenaal, eds. 2017. "Encyclopedia of Spectroscopy and Spectrometry." 3rd ed. Amsterdam: Academic Press. Encyclopedia entries on spectral library searching.
Smith, Brian C. 2011. "Fundamentals of Fourier Transform Infrared Spectroscopy." 2nd ed. Boca Raton, FL: CRC Press. FT-IR and the JCAMP-DX format for transmission spectra.
Larkin, Peter. 2017. "Infrared and Raman Spectroscopy: Principles and Spectral Interpretation." 2nd ed. Amsterdam: Elsevier. Principles of IR/Raman library matching and peak preprocessing.
Structural properties
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❓ Frequently asked questions (3)
What is 121-33-5?
121-33-5 (CAS 121-33-5) is a chemical compound. The chemical data comes from PubChem (National Institutes of Health, USA).
Helpful?
What is the CAS number of 121-33-5?
The CAS number for 121-33-5 is 121-33-5. A CAS Registry Number is the standard identifier for a chemical substance in scientific literature and in trade.
Helpful?
How should 121-33-5 be stored?
121-33-5 should be stored as its safety data sheet directs \— typically in a dry, cool, well-ventilated place, away from heat and from materials it is incompatible with.
Helpful?
➕ Suggest a question
Download structure files
Molecular structure files from the PubChem database (NIH). Compatible with Avogadro, PyMOL, Jmol, and ChemDraw.
Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
g/L ↔ molarity
c (mol/L) = (g/L) / MW
±0.1% (depends on MW precision)
Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
mmol/L ↔ molarity
c (mol/L) = mmol/L × 10⁻³
Exact
Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
Celsius ↔ Kelvin
T(K) = t(°C) + 273.15
±0.01 K (ITS-90 scale)
BIPM (Bureau International des Poids et Mesures) (2019)
Celsius ↔ Fahrenheit
T(°F) = T(°C) × 9/5 + 32
±0.1 °F
Thompson A, Taylor BN (2008)
density-corrected % ↔ molarity
c (mol/L) = (%w/w × ρ × 10) / MW, ρ in g/mL
±0.1% when ρ known to 3 decimals
Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007)
📚 Bibliography (8 authoritative sources)
Thompson A, Taylor BN (2008). Guide for the Use of the International System of Units (SI). NIST Special Publication 811 · DOI: 10.6028/NIST.SP.811-2008 → Primary SI standard for US scientific usage
Cohen ER, Cvitaš T, Frey JG, Holmström B, Kuchitsu K, Marquardt R, Mills I, Pavese F, Quack M, Stohner J, Strauss HL, Takami M, Thor AJ (2007). Quantities, Units and Symbols in Physical Chemistry — The IUPAC Green Book. RSC Publishing, 3rd ed. · DOI: 10.1039/9781847557889 · ISBN: 978-0-85404-433-7 → Canonical IUPAC guide for chemistry quantities/units
BIPM (Bureau International des Poids et Mesures) (2019). The International System of Units (SI), 9th edition. BIPM · ↗ → International SI definitions (incl. redefined kilogram 2019)
ISO/IEC (2022). Quantities and units — Part 1: General. International Organization for Standardization — ISO 80000-1:2022 · ↗ → General rules for physical quantities and units
ISO/IEC (2019). Quantities and units — Part 9: Physical chemistry and molecular physics. International Organization for Standardization — ISO 80000-9:2019 · ↗ → Concentration / molality / amount-of-substance conventions
Tiesinga E, Mohr PJ, Newell DB, Taylor BN (2021). CODATA recommended values of the fundamental physical constants: 2018. Rev. Mod. Phys. 93(2):025010 · DOI: 10.1103/RevModPhys.93.025010 → Avogadro, gas constant, molar volume (2019 SI revision)
IUPAC (2019). Compendium of Chemical Terminology — the IUPAC Gold Book (online). IUPAC · DOI: 10.1351/goldbook → Definitions of mass fraction, molality, normality, ppm, activity
Mills IM, Cvitaš T, Homann K, Kallay N, Kuchitsu K (1988). Quantities, Units and Symbols in Physical Chemistry. Blackwell Scientific Publications, 1st ed. · ISBN: 0-632-01773-5 → Historical predecessor of IUPAC Green Book
Data limitations notice. The safety information on this page is for reference only and does not replace a full safety data sheet (SDS). Before using the product, consult the manufacturer's current safety data sheet and the GHS/CLP guidance. The CLP classification applies to the pure bulk substance, not to commercial formulations.
GHS/CLP classification — Regulation (EC) No 1272/2008 + UN GHS Rev. 9 (2021).
⚠ Classification based on a consensus of sources (PubChem / supplier notifications) — not verified against the harmonised classification in Annex VI (CLP). The scope of hazards may be broader than the official classification; verify against the supplier's current safety data sheet before use.
Translations: CLP Regulation (EC) 1272/2008, Annexes III and IV. Data: PubChem/NLM.
☢️ Toxicological data (IARC + EPA CTX)
🧬 IARC Carcinogen Classification
IARC classification:
No individual IARC entry for this CAS
No separate IARC monograph in the checked lists — this is NOT confirmation of a lack of carcinogenicity. Check the CLP/GHS classification (CMR / GHS section).
🌍 Ecotoxicology & environmental fate (SDS sec. 8/12)
LC₅₀ (fish):
57 mg/L (Pimephales promelas, 96 h)
Source: U.S. EPA ECOTOX Knowledgebase — https://cfpub.epa.gov/ecotox/
📚 Sources:
IARC Monographs (WHO) Last verified: 2026-10-07
Zhang M, Subramaniyan S, Hakkarainen M. (2025). "Divanillin Cross-Linked Recyclable Cellulose Networks.". Macromolecular rapid communications. https://doi.org/10.1002/marc.202401094 [DOI]
Kamaly NA, Kamel AS, Sadik NA et al.. (2025). "Milnacipran and Vanillin Alleviate Fibromyalgia-Associated Depression in Reserpine-Induced Rat Model: Role of Wnt/β-Catenin Signaling.". Molecular neurobiology. https://doi.org/10.1007/s12035-025-04723-w [DOI]
Abdelghafour AM, Mahrous M, Zaher ME. (2025). "Vanillin alleviates oxidative stress-mediated neuronal pyroptosis induced in rats by isoproterenol via SIRT1/NOX4/ROS/TXNIP/NLRP3 signaling pathway.". Food & function. https://doi.org/10.1039/d4fo06458e [DOI]
Santos LDF, Lautru S, Pernodet JL. (2024). "Genetic Engineering Approaches for the Microbial Production of Vanillin.". Biomolecules. https://doi.org/10.3390/biom14111413 [DOI]
Stoff H. (2024). "Paulina S. Gennermann 2023: Eine Geschichte mit Geschmack. Die Natur synthetischer Aromastoffe im 20. Jahrhundert am Beispiel Vanillin und Lisa Haushofer 2022: Wonder Foods: The Science and Commerce of Nutrition.". NTM. https://doi.org/10.1007/s00048-024-00384-3 [DOI]
Liu Y, Sun L, Huo YX et al.. (2023). "Strategies for improving the production of bio-based vanillin.". Microbial cell factories. https://doi.org/10.1186/s12934-023-02144-9 [DOI]
Ma Q, Liu L, Zhao S et al.. (2022). "Biosynthesis of vanillin by different microorganisms: a review.". World journal of microbiology & biotechnology. https://doi.org/10.1007/s11274-022-03228-1 [DOI]
Rakoczy K, Szlasa W, Saczko J et al.. (2021). "Therapeutic role of vanillin receptors in cancer.". Advances in clinical and experimental medicine : official organ Wroclaw Medical University. https://doi.org/10.17219/acem/139398 [DOI]
International Agency for Research on Cancer (IARC). 2024. "IARC Monographs on the Identification of Carcinogenic Hazards to Humans." Lyon: IARC. 🔗
U.S. EPA. 2024. "ECOTOX Knowledgebase." Washington, DC: U.S. Environmental Protection Agency. 🔗
ECHA. 2024. "Chemical Safety Assessment." European Chemicals Agency. 🔗
U.S. National Toxicology Program. 2024. Report on Carcinogens. 15th ed. Research Triangle Park, NC: National Institute of Environmental Health Sciences. 🔗
GESTIS. 2024. "GESTIS Substance Database." Institute for Occupational Safety and Health of the German Social Accident Insurance (DGUV). 🔗
U.S. EPA. 2024. "CompTox Chemicals Dashboard." Washington, DC: U.S. Environmental Protection Agency. 🔗
🚨 Emergency procedure — chemical spillIrritant
CAS 121-33-5GHS:H319H302H411H320H402H412💨 Ventilation
⚠️ GENERIC procedure derived from the GHS classification (no curated data for this CAS). Always follow the supplier's current Safety Data Sheet (SDS).
1. Ventilate; avoid skin/eye contact and dust inhalation.
2. Collect mechanically into a container; rinse residues with water.
3. Mark the slippery/contaminated surface.
4. Wash the area with water; treat residues and absorbent as hazardous waste.
Additional properties from GHS:
• hazardous to the environment — prevent entry into drains, soil and water
🛢️ Large spill (>1L) ⚠️ Hazardous material
1. Restrict the area; PPE: gloves, goggles, a half-mask if dust is generated.
2. Contain and collect mechanically; hand over for disposal according to classification.
3. Collect mechanically into a labeled UN container; hand over to an authorized company (BDO — national rule, Poland).
4. Report the incident per the OHS procedure; on release to the environment notify the Regional Environmental Inspectorate (WIOŚ) (national rule — Poland).
🩹 First aid
🧴 Skin
1. Remove contaminated clothing.
2. Rinse the skin with plenty of water for ≥15 min.
👁️ Eyes
1. Rinse with water for ≥15 min, eyelids held open; remove contact lenses.
2. See an ophthalmologist if irritation persists.
🫁 Inhalation
1. Move the casualty to fresh air, comfortable position.
2. If short of breath — oxygen / doctor.
🍽️ Ingestion
1. Rinse the mouth with water; do NOT induce vomiting.
2. Poison Control Center (Poland): +48 42 631 47 24.
🌍 Environment:
Water: High; Soil: Medium; ❌ Do not release into drains; Waste Code: 16 05 06*
📚 Scientific references (Chicago Author-Date) — 8
European Chemicals Agency (ECHA). 2020. Guidance on the Compilation of Safety Data Sheets — Section 6: Accidental Release Measures. ECHA.
[link ↗]
European Parliament and Council. 2008. Regulation (EC) No 1272/2008 (CLP) — Hazard classes and H-statements. Official Journal of the European Union L 353.
[link ↗]
National Institute for Occupational Safety and Health (NIOSH). 2023. Pocket Guide to Chemical Hazards — NIOSH Pocket Guide to Chemical Hazards. CDC.
[link ↗]
U.S. Occupational Safety and Health Administration. 2024. 29 CFR 1910.120 — Hazardous Waste Operations and Emergency Response (HAZWOPER). U.S. Code of Federal Regulations.
[link ↗]
National Fire Protection Association. 2018. NFPA 472: Standard for Competence of Responders to Hazardous Materials/Weapons of Mass Destruction Incidents. NFPA.
[link ↗]
European Parliament and Council. 2012. Directive 2012/18/EU on the Control of Major-Accident Hazards Involving Dangerous Substances (Seveso III). Official Journal of the European Union L 197: 1–37.
[link ↗]
U.S. National Institute for Occupational Safety and Health. 2024. NIOSH Pocket Guide to Chemical Hazards. Centers for Disease Control and Prevention.
[link ↗]
European Chemicals Agency. 2020. Guidance on the Compilation of Safety Data Sheets (SDS), Version 3.1. ECHA.
[link ↗]
Sources: GHS/CLP classification (PubChem/SDS) — generic fallback · ECHA Guidance on SDS (section 6) · NIOSH Pocket Guide.
Indicative data only — in an emergency, always follow the supplier's instructions and local occupational health and safety (OHS) regulations.
⚠️ Visual PPE guide (personal protective equipment)Irritant
🧤 Gloves
Standard nitrile >0.1 mm EN 374-1 typ C
Standard protection against dermal irritation
👁️ Safety Glasses / Goggles
EN 166 D
Protection against solid particles and droplets; basic category
🥼 Lab Coat / Coverall
Standard cotton lab coat EN 13688
Standard buttoned long sleeve
💨 Ventilation
4 ACH(air changes/hour) General laboratory ventilation
4 ACH minimum for open operations; fume hood for concentrated dusts
📚 Scientific references (Chicago Author-Date)
European Committee for Standardization (CEN). 2016. EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms — Part 1: Terminology and performance requirements for chemical risks. CEN, Brussels. EN 374-1:2016. [link ↗] — Classification of chemical-resistant gloves type A/B/C; JKLPT permeation tests
European Committee for Standardization (CEN). 2001. EN 166:2001 — Personal eye-protection — Specifications. CEN, Brussels. EN 166:2001. [link ↗] — Markings: B = medium-energy impact, T = extreme temperatures, 9 = molten metals and hot solids
European Committee for Standardization (CEN). 2009. EN 14605:2005+A1:2009 — Protective clothing against liquid chemicals — Performance requirements for clothing with liquid-tight (Type 3) or spray-tight (Type 4) connections. CEN, Brussels. EN 14605:2009. [link ↗] — Type 3 (jet-tight) and Type 4 (spray-tight) protection against liquid chemicals
National Institute for Occupational Safety and Health (NIOSH). 2017. Recommendations for Chemical Protective Clothing: A Companion to the NIOSH Pocket Guide. U.S. Department of Health & Human Services / CDC. [link ↗] — Practical guide to CPC (chemical protective clothing) selection per substance and exposure scenario
Occupational Safety and Health Administration (OSHA). 2011. Personal Protective Equipment — General requirements. U.S. Department of Labor — 29 CFR 1910.132. 29 CFR 1910.132. [link ↗] — The employer must provide PPE + training + a documented written hazard assessment
ℹ️ Regulatory obligations checklist for CAS 121-33-5.
Status based on: ADR 2025 (Table A), REACH Annex XVII, CLP Annex VI (harmonised classification), hazard class from the m14-spill DB, SVHC, GIS and the Polish OEL list. Principle: no data = no claim (we do NOT declare "no restrictions" without a basis).
✅SDS (Safety Data Sheet) availablefulfilled
How to comply: Requirement: current SDS compliant with Reg. 1907/2006 (REACH) Annex II, 16-section format.
Legal basis: Regulation (EC) No 1907/2006 (REACH) Art. 31 + Annex II
▣Compliant CLP label (pictograms + signal word + H/P)required
How to comply: The label must include: GHS pictograms, the signal word (Danger/Warning), hazard (H) and precautionary (P) statements, and manufacturer details. Required since 2010 (substances) and 2015 (mixtures).
Legal basis: Regulation (EC) No 1272/2008 (CLP) Art. 17-33
❓ADR transport (international agreement)to be verified
How to comply: No ADR data in the MOL-GOD dataset for this CAS number. Do NOT assume there are no restrictions — before shipping, verify the transport classification in ADR 2025 (Table A) and in section 14 of the safety data sheet (SDS).
Legal basis: ADR 2025 European Agreement + Polish Act of 19 August 2011 on the Transport of Dangerous Goods National rules — Poland
🔵REACH registration (>1 t/year EU import)conditional
How to comply: Importers/manufacturers ≥1 tonne/year must register the substance with ECHA (technical dossier + Chemical Safety Report if ≥10 t). Check the ECHA Annex VI / registered substances list.
Legal basis: Regulation (EC) No 1907/2006 (REACH) Art. 5-22
❓REACH Annex XVII (use/marketing restrictions)to be verified
How to comply: No entry in the harmonised classification dataset (CLP Annex VI) for this CAS number — status of entries 28–30 (CMR ban) NOT VERIFIED; do not assume the restriction does not apply. The dataset of Annex XVII restrictions is also incomplete — check the consolidated Annex XVII and the harmonised CMR classification on the ECHA website.
Legal basis: Regulation (EC) No 1907/2006 (REACH) Annex XVII — restrictions on manufacture, placing on the market and use
European Parliament and Council. 2008. Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP). Official Journal of the European Union L 353/1. CLP Regulation 1272/2008. [link ↗] — Classification, labelling and packaging of substances + mixtures (GHS implementation in the EU)
European Parliament and Council. 2006. Regulation (EC) No 1907/2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH). Official Journal of the European Union L 396/1. REACH Regulation 1907/2006. [link ↗] — REACH — registration, evaluation and authorisation of chemicals; SVHC; SDS Annex II
Ministerstwo Rodziny i Polityki Społecznej Rzeczypospolitej Polskiej. 2024. Rozporządzenie Ministra Rodziny i Polityki Społecznej z dnia 4 września 2024 r. w sprawie najwyższych dopuszczalnych stężeń i natężeń czynników szkodliwych dla zdrowia w środowisku pracy. Dziennik Ustaw RP 2024 poz. 1017. National rules — Poland[link ↗] — NDS and NDSCh for ~600 chemical substances — current Polish occupational exposure limits
United Nations Economic Commission for Europe (UNECE). 2025. European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR), 2025 Edition. United Nations, Geneva. ADR 2025. [link ↗] — International agreement on the road transport of dangerous goods — UN numbers, classes, packaging
📚 Consolidated scientific references — Chicago Author-Date 10 sources
References collected from all Safety Hub tabs. CAS: 121-33-5 ·
PubChem ↗
Parlament Europejski i Rada UE. 2008. "Regulation (EC) nr 1272/2008 w sprawie klasyfikacji, oznakowania i pakowania substancji (CLP)." Dz.Urz. UE L 353. [↗]
GHS, Regulations
United Nations Economic Commission for Europe (UNECE). 2021. "Globally Harmonized System of Classification and Labelling of Chemicals (GHS), Ninth Revised Edition." United Nations, Geneva. [↗]
GHS
Goldfrank, Lewis R., Robert S. Hoffman, Mary Ann Howland, et al.. 2019. "Goldfrank's Toxicologic Emergencies, 11th ed.." McGraw-Hill Education, New York. ISBN 978-1-25-985961-8.
First aid, Toxicology
National Institute for Occupational Safety and Health (NIOSH). 2023. "NIOSH Pocket Guide to Chemical Hazards (DHHS Publ. 2005-149)." U.S. Department of Health and Human Services / CDC, Cincinnati, OH. [↗]
First aid, PPE, Toxicology
European Committee for Standardization (CEN). 2016. "EN 374-1:2016 — Protective gloves against dangerous chemicals and micro-organisms." CEN, Brussels. [↗]
PPE
UNECE. 2023. "European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR 2025)." United Nations, Geneva. [↗]
Disposal, Regulations
National Fire Protection Association (NFPA). 2022. "NFPA 400 — Hazardous Materials Code." NFPA, Quincy, MA. [↗]
Storage
Urben, P.G. (ed.). 2017. "Bretherick's Handbook of Reactive Chemical Hazards, 8th ed.." Butterworth-Heinemann / Elsevier, Oxford. [↗]
Storage
Ministerstwo Klimatu i Środowiska RP. 2023. "Baza danych o produktach i opakowaniach oraz o gospodarce odpadami (BDO)." Ministerstwo Klimatu i Środowiska, Warszawa. National rules — Poland[↗]
Disposal
International Agency for Research on Cancer (IARC / WHO). 2024. "IARC Monographs on the Identification of Carcinogenic Hazards to Humans — List of Classifications." WHO, Lyon. [↗]
Toxicology
Tabs with their own references (Emergency, PPE, Storage, Waste) contain additional bibliographic entries within their respective sections.
Paste a series of replicate measurements (CSV, or one number per line). The calculator computes the mean, standard deviation and 95% CI, and detects outliers (Grubbs + Dixon Q).
Separator: comma, space, tab, new line. Minimum 3 measurements.
📐 Statistical formulas
x̄ = Σxᵢ / n — arithmetic mean
s² = Σ(xᵢ - x̄)² / (n-1) — sample variance
s = √s² — standard deviation
RSD% = (s / x̄) × 100% — relative standard deviation
Choose a buffer from the list of 20 popular systems → enter the target pH → get an exact recipe with the masses to weigh out.
Step 1: Choose a buffer system
Step 2: Buffer parameters
Step 3: Your recipe
Step-by-step procedure:
📐 Calculation details (Henderson-Hasselbalch)
📜 Recipe history (last 10)
📅Project Planner — Lab Experiment ManagerNEW
Plan your entire laboratory project: add experiments with reagents, replicates, and duration. You'll get a Gantt chart, a shopping list (with links to the store!), a budget with a 10% margin, and a GHS risk matrix.
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🧪 Solubility and solvent compatibility
Molecule
Vanillin
Formula
C8H8O3
logP (XLogP3)
1.20
Mass (g/mol)
152.15
Polarity
Moderate
⚠️ GC estimate (Hoftyzer–Van Krevelen). No literature HSP data for this CAS — precision ±2 MPa½. Verify experimentally.
Solvent
Compat.
Ra
Visual
GC-MS
HPLC
Applications
References
Ra < R₀ = good miscibility · Ra < 1,5×R₀ = borderline · above = poor (R₀ — radius of the Hansen sphere of this molecule) For this molecule R₀ = 8..
Solubility theory (applied in compatibility prediction):
Yalkowsky, Samuel H., and Shri C. Valvani. 1980. "Solubility and Partitioning I: Solubility of Nonelectrolytes in Water." Journal of Pharmaceutical Sciences 69 (8): 912–922. https://doi.org/10.1002/jps.2600690814 — General Solubility Equation (GSE): logS = 0.5 − logP − 0.01(MP−25).
Hansen, Charles M. 2007. Hansen Solubility Parameters: A User's Handbook. 2nd ed. CRC Press. https://doi.org/10.1201/9781420006834 — HSP triplet (dD, dP, dH) + Ra formula.
Stefanis, E., and C. Panayiotou. 2008. "Prediction of Hansen Solubility Parameters with a New Group-Contribution Method." Int J Thermophys 29: 568–585. https://doi.org/10.1007/s10765-008-0415-z
Reichardt, Christian, and Thomas Welton. 2011. Solvents and Solvent Effects in Organic Chemistry. 4th ed. Wiley-VCH. https://doi.org/10.1002/9783527632220 — E_T(30) polarity scale, solwatochromia.
Snyder, Lloyd R., Joseph J. Kirkland, and John W. Dolan. 2010. Introduction to Modern Liquid Chromatography. 3rd ed. Wiley. https://doi.org/10.1002/9780470508183 — Eluotropic series, polarity index.
Van Krevelen, D. W., and K. Te Nijenhuis. 2009. Properties of Polymers. 4th ed. Elsevier. https://doi.org/10.1016/B978-0-08-054819-7.X0001-5 — Hoftyzer–Van Krevelen group contribution dla dD/dP/dH z SMILES.
Marcus, Yizhak. 1998. The Properties of Solvents. Wiley Series in Solution Chemistry, Vol. 4. ISBN 9780471983699 — Complete tabular set of 250+ solvents (ε, μ, donicity, acceptor numbers).
PubChem Compound Database — CAS 121-33-5 lookup ↗ — logP (XLogP3), water solubility experimental + predicted.
Full bibliography in the REFERENCES accordion (at the bottom of the page) — Chicago Manual of Style 17th ed., Author-Date.
🧮 Solubility calculator
Solubility:—
logS:—
Method:—
⚠️ —
Solubility vs temperature
🌐 Hansen Solubility Sphere (3D)
⚠️ The Hansen parameters for this substance fall outside the range of the method.
At least one of the δD/δP/δH parameters fell outside the domain of validity of the group contribution method (Hoftyzer–Van Krevelen), so the position of the molecule in Hansen space is unknown. The distance Ra is measured FROM THAT POINT — it cannot be calculated without knowing the point. The sphere and the distance table have been omitted rather than filled with numbers that have nothing behind them. Where a solubility measurement exists, it is shown in the table below.
📊 Automatically extracted topics from the abstracts of 9 publications for CAS 121-33-5.
Algorithm: TF-IDF (Salton & Buckley 1988) — term frequency × inverse document frequency.
production 2
signaling 2
🔍 Ranking details (TF-IDF)
Tag
TF
DF
IDF
Score
production
2
2
2.204
4.408
signaling
2
2
2.204
4.408
🔗 Citation network9 seed papers
📊 Graf citations for CAS 121-33-5.
Each node = a research paper; an A→B edge = paper A cites B. Data from OpenAlex (Priem 2022).
⚡ Fetch network data
Network built on-demand from the OpenAlex API (24h cache).
Why this page can be checked
Identity
CAS, EC and molecular formula, resolved across the identifier systems a buyer uses. The count of systems resolved is shown, so you can see how well characterised this substance is rather than assuming.
Data
Every physicochemical value carries the source it came from and the date that source was read. Open any of them.
Classification
Read against the harmonised entry where one exists, with the index number stated. Self-classification is shown separately and labelled.
Regulatory
Inventory, restriction, authorisation and candidate-list status, each stated individually. Where a status is not established, this page says so — it never says no restrictions apply.
Documentation
Which documents exist, at what review level, in which languages, and when each was issued.
Supplier
Who is selling this, and what they have published about themselves.
Nothing on this page is a certification. It is a record you can audit.
Two guarantees, both with their limits stated
The Gap Report Guarantee
If the available evidence cannot support a defensible document for your CAS number and product specification, we will not invent the missing values. You receive a documented gap report and choose: a refund, store credit, or the report on its own.
A visible gap is worth more than a plausible number, because the plausible number is the one that fails when somebody checks it.
The Re-issue Promise
If a signed card is rejected by an authority or by a customer’s compliance officer on one of the points we checked and reported as passed, we re-issue it corrected at no charge and credit the original fee.
This covers the checks we performed and named. It does not cover registration status, tonnage, or your role in the supply chain — those are not ours to hold, and a guarantee that pretended otherwise would be worth nothing.
For vanillin (CAS 121-33-5) the documentation obligation begins before the first shipment. This page sets out what the safety data sheet has to establish.
Documentation issued – safety data sheet in REACH Annex II structure; working draft or signed card
What is supplied – a document. MolGod.org does not sell, supply or ship chemical substances.
What is the CLP classification of vanillin?
Vanillin has no harmonised entry in CLP Annex VI, so there is no binding classification to copy. The sheet carries the classification derived from aggregated notifications in the ECHA C&L Inventory and states that basis in section 2; the importer remains responsible for confirming it against the manufacturer’s data.
Disposal route and waste classification
Disposal of vanillin and of its packaging is section 13, and it has to align with the classification: a substance with an aquatic hazard cannot be routed to drain, and the waste code assigned by the holder follows from the hazard profile, not from convenience.
How is vanillin classified for road, sea and air transport?
Section 14 for CAS 121-33-5 carries the UN number, proper shipping name, class, packing group and environmental hazard where these apply. Where the substance is not dangerous for carriage, the section says so explicitly rather than being left empty — an empty section 14 reads as an omission, not as an absence of hazard.
Which version do you need?
📄
SDS Working Draft
€49.99
Delivered automatically after payment, by e-mail
Full 16-section REACH Annex II structure
Classification against ECHA CLP Annex VI
Public-source data with references
Unresolved gaps flagged, never filled by guesswork
For internal drafting and supplier review. Unsigned; supplier-specific fields may need completing.
Best for
Seeing what the document will contain before you commit
Comparing what a supplier sent you against the register
Finding the gaps in a sheet you already hold
Preparing an internal file before an export decision
Substances you handle but do not yet sell
Recommended when the document leaves your company✍
Expert-Reviewed SDS
€249.99
Everything in the Working Draft
Reviewed by a competent person under Annex II, section by section
Adapted to your company, product grade and identified use
Destination market and language checked
Transport section reviewed for the mode you request
Five rounds of corrections applied to your instructions
Within 72 hours of receiving complete input.
Best for
Any document that leaves your company
A customer or distributor who asked for the sheet
Paperwork travelling with an export shipment
A sheet an inspector or authority may read
Replacing a sheet a customer has already rejected
If you are unsure, read down the left column and stop at the first line that describes your situation.
What the document is for
Working Draft €49.99
Expert-Reviewed €249.99
Internal drafting and review
Yes
Yes
Checking a sheet a supplier sent you
Yes
Yes
Sent to your customer
Not written for this
Yes
Travels with an export shipment
Not written for this
Yes
Read by an inspector or authority
Not written for this
Yes
Adapted to your company, grade and identified use
No
Yes
Signed and dated by the reviewer
No
Yes
When you get it
Immediately after payment
Within 72 hours of complete input
Nothing stops you sending a draft to anyone. "Not written for this" means exactly that: it carries no signature and no fields adapted to your company, so it will not answer the questions the recipient is about to ask.
What the signature means
Who prepares the document
The document is generated by the MolGod engine from ECHA CLP Annex VI and the cited public sources, then read section by section by a qualified scientific reviewer with a degree in chemistry or a related scientific field.
What the review covers
The sheet is read section by section against the REACH Annex II structure. GHS classification and transport entries are checked against the sources cited in the document, and the sheet is adapted to the company, product grade and identified use you provide.
What is NOT verified
We do not test your material and we cannot confirm what is physically in your container: composition, concentration, impurities or manufacturing route. Those come from you and are reproduced as supplied.
What the signature is — and is not
The signature records that a qualified scientific reviewer read the document. It is not a government approval, not an ECHA approval, and not a legal certification — no such certification exists for safety data sheets in the EU. A signature does not by itself make a document legally valid or make your business compliant.
What you receive
A PDF in the 16-section REACH Annex II structure, signed and dated, with version information and a list of anything we could not establish. Five rounds of corrections are included.
Delivery
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📚 Scientific references (Chicago Author-Date) — click to expand
Batch management and laboratory certification standards — 13 independent sources (ICH Q1/Q3/Q6/Q7/Q10 + ISO 17025 + WHO TRS + 21 CFR 211 + EMA + USP + Ph.Eur. + PIC/S + IPEC-PQG).
International Council for Harmonisation (ICH). 2000. "Q7 Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients." ICH Expert Working Group. [link ↗] — GMP for APIs — adopted by EMA, FDA, MHLW
International Organization for Standardization. 2017. "ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories." ISO. [link ↗] — Lab accreditation standard underpinning every CoA
World Health Organization. 2010. "WHO Good Manufacturing Practices for Pharmaceutical Products: Main Principles (WHO Technical Report Series No. 957, Annex 3)." WHO Press. [link ↗] — WHO TRS No. 957 — global reference for GMP
International Council for Harmonisation (ICH). 2003. "ICH Q1A(R2): Stability Testing of New Drug Substances and Products." International Council for Harmonisation. [link ↗] — Source for batch shelf-life and retest dating
International Council for Harmonisation (ICH). 2006. "ICH Q3A(R2): Impurities in New Drug Substances." ICH. [link ↗]
International Council for Harmonisation (ICH). 1999. "ICH Q6A: Specifications for New Drug Substances and Products." ICH. [link ↗] — CoA acceptance-criteria specification standard
International Council for Harmonisation (ICH). 2008. "ICH Q10: Pharmaceutical Quality System." ICH. [link ↗]
U.S. Food and Drug Administration. 2024. "21 CFR Part 211: Current Good Manufacturing Practice for Finished Pharmaceuticals." US Code of Federal Regulations. [link ↗] — US legal mandate (Subpart J — Records and Reports)
European Medicines Agency. 2014. "Guideline on Process Validation for Finished Products — Information and Data to Be Provided EMA/CHMP/CVMP/QWP/BWP/70278/2012." European Medicines Agency. [link ↗]
United States Pharmacopeial Convention. 2024. "United States Pharmacopeia and National Formulary, USP 47-NF 42." USP. [link ↗]
European Pharmacopoeia Commission. 2024. "European Pharmacopoeia 11th Edition." Council of Europe — EDQM. [link ↗]
Pharmaceutical Inspection Co-operation Scheme (PIC/S). 2021. "Guide to Good Manufacturing Practice for Medicinal Products PE 009-15." PIC/S Secretariat, Geneva. [link ↗] — Cross-recognized GMP for 54 inspectorates worldwide
International Pharmaceutical Excipients Council (IPEC) and Pharmaceutical Quality Group (PQG). 2017. "Joint IPEC-PQG Good Manufacturing Practices Guide for Pharmaceutical Excipients." IPEC-Americas. [link ↗] — Excipient-grade CoA standard for non-API ingredients
📜 Patents (public metadata)
no data
No public patent metadata was found for this substance in Crossref / OpenAlex at this time. Data will be updated automatically after the next cache refresh (24h).
📚 References (Chicago Author-Date) — click to expand
Zhang M, Subramaniyan S, Hakkarainen M. (2025). "Divanillin Cross-Linked Recyclable Cellulose Networks.". Macromolecular rapid communications. https://doi.org/10.1002/marc.202401094
Kamaly NA, Kamel AS, Sadik NA et al.. (2025). "Milnacipran and Vanillin Alleviate Fibromyalgia-Associated Depression in Reserpine-Induced Rat Model: Role of Wnt/β-Catenin Signaling.". Molecular neurobiology. https://doi.org/10.1007/s12035-025-04723-w
Abdelghafour AM, Mahrous M, Zaher ME. (2025). "Vanillin alleviates oxidative stress-mediated neuronal pyroptosis induced in rats by isoproterenol via SIRT1/NOX4/ROS/TXNIP/NLRP3 signaling pathway.". Food & function. https://doi.org/10.1039/d4fo06458e
Santos LDF, Lautru S, Pernodet JL. (2024). "Genetic Engineering Approaches for the Microbial Production of Vanillin.". Biomolecules. https://doi.org/10.3390/biom14111413
Stoff H. (2024). "Paulina S. Gennermann 2023: Eine Geschichte mit Geschmack. Die Natur synthetischer Aromastoffe im 20. Jahrhundert am Beispiel Vanillin und Lisa Haushofer 2022: Wonder Foods: The Science and Commerce of Nutrition.". NTM. https://doi.org/10.1007/s00048-024-00384-3
Liu Y, Sun L, Huo YX et al.. (2023). "Strategies for improving the production of bio-based vanillin.". Microbial cell factories. https://doi.org/10.1186/s12934-023-02144-9
Ma Q, Liu L, Zhao S et al.. (2022). "Biosynthesis of vanillin by different microorganisms: a review.". World journal of microbiology & biotechnology. https://doi.org/10.1007/s11274-022-03228-1
Rakoczy K, Szlasa W, Saczko J et al.. (2021). "Therapeutic role of vanillin receptors in cancer.". Advances in clinical and experimental medicine : official organ Wroclaw Medical University. https://doi.org/10.17219/acem/139398
World Intellectual Property Organization. 2024. "Patent Cooperation Treaty (PCT)." https://www.wipo.int/pct/.
U.S. Patent and Trademark Office. 2024. "USPTO Patent Public Search." https://ppubs.uspto.gov/.
European Patent Office. 2024. "Espacenet Patent Search." https://worldwide.espacenet.com/.
Newman, David J., and Gordon M. Cragg. 2020. "Natural Products as Sources of New Drugs over the Nearly Four Decades from 01/1981 to 09/2019." Journal of Natural Products 83 (3): 770-803.
Davies, Mark, Michał Nowotka, George Papadatos, et al. 2015. "ChEMBL Web Services: Streamlining Access to Drug Discovery Data and Utilities." Nucleic Acids Research 43 (W1): W612-W620.
Bickerton, G. Richard, Gaia V. Paolini, Jérémy Besnard, Sorel Muresan, and Andrew L. Hopkins. 2012. "Quantifying the Chemical Beauty of Drugs." Nature Chemistry 4 (2): 90-98.
Meanwell, Nicholas A. 2011. "Synopsis of Some Recent Tactical Application of Bioisosteres in Drug Design." Journal of Medicinal Chemistry 54 (8): 2529-2591.
Ertl, Peter, and Ansgar Schuffenhauer. 2009. "Estimation of Synthetic Accessibility Score of Drug-Like Molecules Based on Molecular Complexity and Fragment Contributions." Journal of Cheminformatics 1: 8.
Hopkins, Andrew L., and Colin R. Groom. 2002. "The Druggable Genome." Nature Reviews Drug Discovery 1 (9): 727-730.
Allison, John R., and Mark A. Lemley. 1998. "Empirical Evidence on the Validity of Litigated Patents." AIPLA Quarterly Journal 26 (3): 185-275.
Patani, George A., and Edmond J. LaVoie. 1996. "Bioisosterism: A Rational Approach in Drug Design." Chemical Reviews 96 (8): 3147-3176.
Lerner, Josh. 1994. "The Importance of Patent Scope: An Empirical Analysis." RAND Journal of Economics 25 (2): 319-333.
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📚 REFERENCES (Aggregate bibliography, Chicago Author-Date) 77 items
All scientific sources cited in the accordions above for CAS 121-33-5. Format: Chicago Manual of Style 17th ed., Author-Date system.
AIST. n.d. Spectral Database for Organic Compounds (SDBS): CAS 121-33-5. Tsukuba, Japan: National Institute of Advanced Industrial Science and Technology. https://sdbs.db.aist.go.jp/.
Linstrom, Peter J., and William G. Mallard, eds. n.d. NIST Chemistry WebBook: NIST Standard Reference Database Number 69. Gaithersburg, MD: National Institute of Standards and Technology. https://doi.org/10.18434/T4D303.
PubChem. n.d. PubChem Compound Summary: CAS 121-33-5. Bethesda, MD: National Center for Biotechnology Information (NCBI), National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/#query=121-33-5.
European Chemicals Agency (ECHA). 2024. "Annex VI to Regulation (EC) No 1272/2008 (CLP) — Harmonised Classification and Labelling." ECHA, Helsinki / Official Journal of the European Union. https://echa.europa.eu/regulations/clp/clp-classification.
National Institute for Occupational Safety and Health (NIOSH). 2017. "Recommendations for Chemical Protective Clothing: A Companion to the NIOSH Pocket Guide." U.S. Department of Health & Human Services / CDC. https://www.cdc.gov/niosh/ncpc/default.html.
Connors, Kenneth A., Gordon L. Amidon, and Valentino J. Stella. 1986. Chemical Stability of Pharmaceuticals: A Handbook for Pharmacists, 2nd ed.. New York: Wiley. https://doi.org/10.1002/0471734683.
Rumble, John R., ed. 2019. CRC Handbook of Chemistry and Physics: 100th Edition. Boca Raton, FL: CRC Press. https://hbcp.chemnetbase.com/.
Stefanis, Emmanuel, and Costas Panayiotou. 2008. "Prediction of Hansen Solubility Parameters with a New Group-Contribution Method." International Journal of Thermophysics 29: 568-585. https://doi.org/10.1007/s10765-008-0415-z.
Stoll, Vincent S., and John S. Blanchard. 1990. "Buffers: Principles and Practice: In Methods in Enzymology, vol. 182." San Diego: Academic Press. https://doi.org/10.1016/0076-6879(90)82008-P.
European Parliament. 2008. "Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures (CLP)." Official Journal of the European Union L 353: 1–1355.
United Nations. 2021. Globally Harmonized System of Classification and Labelling of Chemicals (GHS). 9th revised ed. ST/SG/AC.10/30/Rev.9. New York and Geneva: United Nations. https://unece.org/ghs-rev9-2021.
United States Pharmacopeial Convention. 2024. "USP <621> Chromatography." In United States Pharmacopeia and National Formulary, USP 47-NF 42. Rockville, MD: USP. https://www.uspnf.com/.
International Organization for Standardization. 2017. "ISO/IEC 17025:2017 General Requirements for the Competence of Testing and Calibration Laboratories." Geneva: ISO. https://www.iso.org/standard/66912.html.
Kolthoff, Izaak Maurits, and Philip J. Elving, eds. 1978. Treatise on Analytical Chemistry, Part I: Theory and Practice. 2nd ed. New York: Wiley-Interscience.
Skoog, Douglas A., F. James Holler, and Stanley R. Crouch. 2018. Principles of Instrumental Analysis. 7th ed. Boston: Cengage Learning.
Christian, Gary D., Purnendu K. Dasgupta, and Kevin A. Schug. 2014. Analytical Chemistry. 7th ed. Hoboken, NJ: Wiley.
International Organization for Standardization. 1994. "ISO 5725-2:1994 Accuracy (Trueness and Precision) of Measurement Methods and Results — Part 2: Basic Method for the Determination of Repeatability and Reproducibility of a Standard Measurement Method." Geneva: ISO. https://www.iso.org/standard/11834.html.
Heckert, N. A., and J. J. Filliben. 2003. "NIST/SEMATECH e-Handbook of Statistical Methods." NIST Handbook 151. Gaithersburg, MD: National Institute of Standards and Technology. https://www.itl.nist.gov/div898/handbook/.
Grubbs, Frank E. 1950. "Sample Criteria for Testing Outlying Observations." Annals of Mathematical Statistics 21 (1): 27–58.
Dixon, Wilfrid J. 1950. "Analysis of Extreme Values." Annals of Mathematical Statistics 21 (4): 488–506.
Snedecor, George W., and William G. Cochran. 1989. Statistical Methods. 8th ed. Ames, IA: Iowa State University Press.
Student [William Sealy Gosset]. 1908. "The Probable Error of a Mean." Biometrika 6 (1): 1–25.
International Organization for Standardization. 2005. "ISO 3534-1:2006 Statistics — Vocabulary and Symbols — Part 1: General Statistical Terms and Terms Used in Probability." Geneva: ISO. https://www.iso.org/standard/40145.html.
Thompson, Michael, Stephen L. R. Ellison, and Roger Wood. 2002. "Harmonized Guidelines for Single-Laboratory Validation of Methods of Analysis." Pure and Applied Chemistry 74 (5): 835–855.
United Nations Economic Commission for Europe. 2024. European Agreement Concerning the International Carriage of Dangerous Goods by Road (ADR), Applicable as from 1 January 2025 (ECE/TRANS/352). Geneva: UNECE. https://unece.org/transport/dangerous-goods/adr-2025-edition.
Ministerstwo Klimatu i Środowiska Rzeczypospolitej Polskiej. 2020. "Rozporządzenie Ministra Klimatu z dnia 2 stycznia 2020 r. w sprawie katalogu odpadów." Dziennik Ustaw RP 2020 poz. 10. https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20200000010. National rules — Poland
Główny Inspektorat Ochrony Środowiska (GIOŚ). 2024. "Baza Danych O Odpadach (BDO) — System rejestracji firm utylizacyjnych." Ministerstwo Klimatu i Środowiska. https://bdo.mos.gov.pl/. National rules — Poland
International Organization for Standardization. 2017. "ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories." ISO. https://www.iso.org/standard/66912.html.
World Health Organization. 2010. "WHO Good Manufacturing Practices for Pharmaceutical Products: Main Principles (WHO Technical Report Series No. 957, Annex 3)." WHO Press. https://www.who.int/publications/m/item/trs957-annex3.
Pharmaceutical Inspection Co-operation Scheme (PIC/S). 2021. "Guide to Good Manufacturing Practice for Medicinal Products PE 009-15." PIC/S Secretariat, Geneva. https://picscheme.org/en/publications.
