# Formaldehyde

**CAS:** 50-00-0  
**PubChem CID:** [712](https://pubchem.ncbi.nlm.nih.gov/compound/712)  
**Molecular formula:** CH2O  
**Molar mass:** 30.026 g/mol  
**IUPAC:** formaldehyde  
**SMILES:** `C=O`  
**InChIKey:** `WSFSSNUMVMOOMR-UHFFFAOYSA-N`  
**InChI:** `InChI=1S/CH2O/c1-2/h1H2`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| logP (XLogP3) | 1.2 |
| PSA | 17.1 Ų |
| Hydrogen bond donors | 0 |
| Hydrogen bond acceptors | 1 |
| Rotatable bonds | 0 |
| Heavy atoms | 2 |

## 3D structure

The molecule contains 4 atoms connected by 3 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/50-00-0/

## GHS classification

**Signal word:** Danger

**Pictograms:** GHS05, GHS06, GHS07, GHS08

### Hazard statements (H)

- **H350** — May cause cancer
- **H341** — Suspected of causing genetic defects
- **H302** — Harmful if swallowed
- **H330** — Fatal if inhaled
- **H314** — Causes severe skin burns and eye damage
- **H317** — May cause an allergic skin reaction
- **H335** — May cause respiratory irritation

### Precautionary statements (P)

- **P203** — Obtain, read and follow all safety instructions before use
- **P260** — Do not breathe dust/fume/gas/mist/vapours/spray

## Synonyms

- formaldehyde
- formalin
- methanal
- 50-00-0
- formol
- Formic aldehyde
- Methylene oxide
- Oxomethane
- Oxymethylene
- Methyl aldehyde

## Available in the shop

[formaldehyde … % (CAS 50-00-0) — Safety Data Sheet](https://molgod.org/sds-cards/formaldehyde-cas-50-00-0-safety-data-sheet/)

## Regulatory compliance checklist

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).

8 required / 12 items

### SDS (Safety Data Sheet) available

- **required** (required / sds)
- How to comply: Requirement: current SDS compliant with Reg. 1907/2006 (REACH) Annex II, 16-section format.
- [Source / form](https://echa.europa.eu/information-on-chemicals)

### Compliant CLP label (pictograms + signal word + H/P)

- **required** (required / clp_label)
- 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). For this substance a HARMONISED CLASSIFICATION applies (CLP Annex VI) — see below; it takes precedence over self-classification.
- CLP VI: Carc. 1B, Muta. 2, Acute Tox. 2, Acute Tox. 4, Skin Corr. 1B, Skin Sens. 1A, STOT SE 3 — H350, H341, H330, H302, H314, H317, H335
- [Source / form](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32008R1272)

### Chemical OSH training (substance-specific)

- **required** (required / bhp_training)
- How to comply: Laboratory staff: initial training (general induction + job-specific) + refresher training every 5 years (or every 3 for engineering/technical positions). Documentation kept in personnel files.
- [Source / form](https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20040180169)

### BDO registration (Polish Waste Database)

- **required** (required / bdo_registration)
- How to comply: The GHS classification of this substance indicates properties that may render the waste arising from it hazardous (Regulation 1357/2014, HP properties — with concentration thresholds calculated from the content in the waste, not in the reagent). Whether this gives rise to an obligation to keep BDO records depends on the waste producer and the scale of activity (Art. 50 of the Polish Waste Act; exemptions include up to 100 kg/year of hazardous waste). This is not a statement of obligation for the purchaser.
- [Source / form](https://bdo.mos.gov.pl/)

### ADR transport (international agreement)

- **required** (required / adr_transport)
- How to comply: Road transport compliant with ADR 2025: Class 8, UN 2209, PG III. Required: DGSA safety adviser certificate, class + UN labels, transport documents, packaging compliant with Chapter 6.
- UN: UN 2209 / 8 / PG III
- [Source / form](https://unece.org/transport/dangerous-goods/adr-2025-files)

### REACH registration (>1 t/year EU import)

- **conditional** (conditional / reach_registration)
- 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.
- [Source / form](https://echa.europa.eu/regulations/reach/registration)

### SVHC notification (Substances of Very High Concern)

- **to be verified** (unknown / svhc_declaration)
- How to comply: SVHC status not verified against the available dataset — check the current ECHA candidate list; do not assume the absence of an entry.
- [Source / form](https://echa.europa.eu/candidate-list-table)

### REACH Annex XIV (authorisation list)

- **to be verified** (unknown / reach_annex_xiv)
- How to comply: Not verified against the ECHA Authorisation List — check REACH Annex XIV.
- [Source / form](https://echa.europa.eu/authorisation-list)

### REACH Annex XVII (use/marketing restrictions)

- **required** (required / reach_annex_xvii)
- How to comply: Substance subject to a REACH Annex XVII restriction (entry 77): Formaldehyde — restriction on emissions from articles (furniture, wood-based products); air concentration limit 0.062 mg/m3 (0.05 ppm). Check the conditions for placing on the market/use and the note in SDS section 15.
- REACH XVII 77: Formaldehyde — restriction on emissions from articles (furniture, wood-based products); air concentration limit 0.062 mg/m3 (0.05 ppm).
- [Source / form](https://echa.europa.eu/substances-restricted-under-reach)

### OEL — Occupational Exposure Limit in the working environment

- **required** (required / nds_workplace)
- How to comply: NDS (workplace exposure limit) for this substance: 0.37 mg/m³ (NDS 8h) · 0.74 mg/m³ (NDSCh 15min). Air concentration measurements at the workplace at least 1×/2 years (when ≤0.1 NDS) or 1×/year (when 0.1-0.5 NDS). Accredited measurement laboratory.
- NDS: 0.37 mg/m³ (NDS 8h) · 0.74 mg/m³ (NDSCh 15min)
- [Source / form](https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20240001017)

### GIS register (precursors / psychotropics)

- **to be verified** (unknown / gis_register)
- How to comply: Does not appear in the available working set of precursors (list incomplete). Absence is NOT a confirmation — verify against Annex I of Reg. (EC) 273/2004 and the GIS list before placing on the market.
- [Source / form](https://www.gov.pl/web/gis)

### Safety Data Sheet in Polish

- **required** (required / sds_pl)
- How to comply: Requirement: SDS in Polish for trade in PL (Art. 31 REACH + Chemical Substances Act Art. 17).
- [Source / form](https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20012112135)


## Data sources

- [PubChem CID 712](https://pubchem.ncbi.nlm.nih.gov/compound/712)
- [Wikidata](https://www.wikidata.org/wiki/Q161210)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=50-00-0)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=50-00-0)

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*Last updated: 2026-09-25 · Generator: MOL-GOD v3.12.33*