Malachite green hydrochloride [1]; Malachite green oxalate [2]
Malachite green hydrochloride [1]; Malachite green oxalate [2] is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.
Chemical identity and properties

Malachite Green
Malachite green is an organic chloride salt that is the monochloride salt of malachite green cation. Used as a green-coloured dye, as a counter-stain in histology, and for its anti-fungal properties in aquaculture. It has a role as an antibacterial agent, a carcinogenic agent, a teratogenic agent, a fluorochrome, a histological dye, an environmental contaminant and an antifungal drug. It contains a malachite green cation. — ChEBI
- IUPAC name
- [4-[[4-(dimethylamino)phenyl]-phenylmethylidene]cyclohexa-2,5-dien-1-ylidene]-dimethylazanium chloride
- Molecular formula
- C23H25ClN2
- Molecular weight
- 364.9 g/mol
- Exact mass
- 364.1706265 Da
- Topological polar surface area
- 6.3 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 2
- Covalent units
- 2
- Defined stereocentres
- 0
Also known as
16 more reported names
External database identifiers
- ChEBI:CHEBI:72449
- ChEMBL:CHEMBL186357
- EPA DTXSID:DTXSID1025512
- PubMed:9539
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.
Record details
Chemical name
Malachite green hydrochloride [1]; Malachite green oxalate [2]
Chemical / IUPAC name
Malachite green hydrochloride [1]; Malachite green oxalate [2]
Regulatory information
SCCS opinions
- Opinion concerning Request for Confirmation of the SCCNFP Opinion 0474/01 on Chemical Ingredients in Cosmetic Products Classified as Carcinogenic, Mutagenic or Toxic to Reproduction according to Council Directive 67/548/EEC
- Opinion concerning Request for Confirmation of the SCCNFP Opinion 0474/01 on Chemical Ingredients in Cosmetic Products Classified as Carcinogenic, Mutagenic or Toxic to Reproduction according to Council Directive 67/548/EEC
Identified ingredients
CMR
| Category | Carcinogenic | Mutagenic | Reprotoxic |
|---|---|---|---|
| Cat. 2 | — | — | ✓ |
Key data
Inventory links for Malachite green hydrochloride [1]; Malachite green oxalate [2]
Related records for Malachite green hydrochloride [1]; Malachite green oxalate [2]
Direct matches are limited for this record, so nearby entries from Annex II are shown as well.
A mixture of: Reaction product of 4,4'-methylenebis[2-(4-hydroxybenzyl)-3,6-dimethylphenol] and 6-d…
1-(4-Chlorophenyl)-4,4-dimethyl-3-(1,2,4-triazol-1-ylmethyl)pentan-3-ol
A 2:1 mixture of: 4-(7-Hydroxy-2,4,4-trimethyl-2-chromanyl)resorcinol-4-yl-tris(6-diazo-5,6-dihydr…
5-(3-Butyryl-2,4,6-trimethylphenyl)-2-[1-(ethoxyimino)propyl]-3-hydroxycyclohex-2-en-1-one
O,O'-(Ethenylmethylsilylenedi[(4-methylpentan-2-one)oxime]
N,N-Dimethylanilinium tetrakis(pentafluorophenyl)borate
A mixture of: 5-[(4-[(7-Amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-2,5-diethoxyphenyl)azo]-2-[(3-phos…
2-{4-(2-Ammoniopropylamino)-6-[4-hydroxy-3-(5-methyl-2-methoxy-4-sulfamoylphenylazo)-2-sulfonatonap…
5-Nitro-o-toluidine [1]; 5-Nitro-o-toluidine hydrochloride [2]
What Annex II means for Malachite green hydrochloride [1]; Malachite green oxalate [2]
Malachite green hydrochloride [1]; Malachite green oxalate [2] is listed as a prohibited substance under Annex II of EU Cosmetics Regulation 1223/2009 and must not be intentionally added. Article 17 separately addresses unintended small quantities that are technically unavoidable under good manufacturing practice and compatible with the Article 3 safety requirement.
Formulators must screen their ingredients and raw materials to ensure none contain this substance. Suppliers should provide documentation confirming absence when requested.
This record is linked to 1 CosIng inventory ingredient for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.
Compliance checklist
- Verify this substance is absent from all raw materials and finished formulations.
- Request absence confirmation or CoA from raw material suppliers.
- Document the screening result in the Product Information File (PIF).
- This substance has CMR classification. Review the CMR table above and verify current Annex II/III status before use.
Frequently asked questions
Source note for Annex II record Malachite green hydrochloride [1]; Malachite green oxalate [2]
This page summarizes one Annex II record for Malachite green hydrochloride [1]; Malachite green oxalate [2] from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.
Use this record page to review Annex II conditions for Malachite green hydrochloride [1]; Malachite green oxalate [2], but confirm any final regulatory decision against the current official annex wording and source files.
Tools & next steps
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