# Zinc Chromate

**CAS:** 37300-23-5  
**PubChem CID:** [26089](https://pubchem.ncbi.nlm.nih.gov/compound/26089)  
**Molecular formula:** CrO4Zn  
**Molar mass:** 181.4 g/mol  
**IUPAC:** zinc dioxido(dioxo)chromium  
**SMILES:** `[O-][Cr](=O)(=O)[O-].[Zn+2]`  
**InChIKey:** `NDKWCCLKSWNDBG-UHFFFAOYSA-N`  
**InChI:** `InChI=1S/Cr.4O.Zn/q;;;2*-1;+2`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| PSA | 80.3 Ų |
| Hydrogen bond donors | 0 |
| Hydrogen bond acceptors | 4 |
| Rotatable bonds | 0 |
| Heavy atoms | 6 |

## 3D structure

The molecule contains 6 atoms connected by 4 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/37300-23-5/

## GHS classification

**Signal word:** Danger

**Pictograms:** GHS05, GHS07, GHS08, GHS09

**Classification status:** 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.

### Hazard statements (H)

- **H302** — Harmful if swallowed
- **H317** — May cause an allergic skin reaction
- **H350** — May cause cancer
- **H400** — Very toxic to aquatic life
- **H410** — Very toxic to aquatic life with long lasting effects
- **H318** — Causes serious eye damage
- **H334** — May cause allergy or asthma symptoms or breathing difficulties if inhaled
- **H361** — Suspected of damaging fertility or the unborn child

### Precautionary statements (P)

- **P201** — Obtain special instructions before use
- **P202** — Do not handle until all safety precautions have been read and understood
- **P261** — Avoid breathing dust/fume/gas/mist/vapours/spray
- **P264** — Wash thoroughly after handling
- **P270** — Do not eat, drink or smoke when using this product
- **P272** — Contaminated work clothing should not be allowed out of the workplace
- **P273** — Avoid release to the environment
- **P280** — Wear protective gloves/protective clothing/eye protection/face protection
- **P284** — Wear respiratory protection
- **P301+P312** — IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- **P302+P352** — IF ON SKIN: Wash with plenty of water
- **P304+P340** — IF INHALED: Remove person to fresh air and keep comfortable for breathing
- **P305+P351+P338** — IF IN EYES: Rinse cautiously with water for several minutes; Remove contact lenses, if present and easy to do. Continue rinsing
- **P308+P313** — IF exposed or concerned: Get medical advice/attention
- **P310** — Immediately call a POISON CENTER or doctor/physician
- **P321** — Specific treatment
- **P330** — Rinse mouth
- **P333+P313** — If skin irritation or rash occurs: Get medical advice/attention
- **P342+P311** — If experiencing respiratory symptoms: Call a POISON CENTER or doctor/physician
- **P362+P364** — Take off contaminated clothing
- **P391** — Collect spillage
- **P405** — Store locked up
- **P501** — Dispose of contents/container to an approved waste collection point

## Synonyms

- ZINC CHROMATE
- 13530-65-9
- Zinc Chrome Yellow
- Zinc chrome
- Buttercup Yellow
- Zincro ZTO
- Zinc chromate C
- Zinc chromate O
- Zinc chromate T
- Zinc chromate Z

## 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).

3 required / 12 items

### SDS (Safety Data Sheet) available

- **fulfilled** (met / 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).
- [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)

- **to be verified** (unknown / adr_transport)
- How to comply: Section 14 of the safety data sheet states UN 3288, but without a confirmed ADR class — verify the transport class in ADR 2025 (Table A) before shipping. Do NOT assume there are no restrictions.
- [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)

- **to be verified** (unknown / reach_annex_xvii)
- 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.
- [Source / form](https://echa.europa.eu/substances-restricted-under-reach)

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

- **to be verified** (unknown / nds_workplace)
- How to comply: No NDS data in the MOL-GOD dataset (incomplete set — ~41 of ~600 substances in the list). Absence does NOT mean there is no NDS — check the full list in Dz.U. 2024 poz. 1017 (Regulation of the Ministry of Family and Social Policy of 4 September 2024), and where none exists apply the OEL from EU directives or values recommended by NIOSH/ACGIH.
- [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

- **fulfilled** (met / 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 26089](https://pubchem.ncbi.nlm.nih.gov/compound/26089)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=37300-23-5)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=37300-23-5)

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**How to cite:** MolGod.org. "Zinc Chromate (CAS 37300-23-5)." Last modified 2026-09-03. https://molgod.org/molecule/37300-23-5/ — for a chemical fact, cite its primary source (PubChem CID 26089); for a 3D model file, cite its MolGod ID, the variant and the SHA-256 from its licence record.

*Last updated: 2026-09-03 · Generator: MOL-GOD v3.12.33*