Official EU label nameGlossary entry 845

ACID BLUE 3

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:3536-49-0

EC:222-573-8

Ingredient index records:

ACID BLUE 3

Cosmetic functions: HAIR DYEING

Bis[hydrogen [4-[4-(diethylamino)-5'-hydroxy-2',4'-disulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene]diethylammonium], calcium salt (CI 42051)

Inventory restriction note: II/1356 (Acid Blue 3; CI 42051: when used as a substance in hair dye products)

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1 matched or reported name

ACID BLUE 3

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name ACID BLUE 3.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 3536-49-0

CAS 3536-49-0PubChem CID 77073

Acid Blue 3

C.I. Acid Blue 3 is a diarylmethane. — ChEBI

IUPAC name: calcium bis(4-[[4-(diethylamino)phenyl]-(4-diethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]-6-hydroxybenzene-1,3-disulfonate)

Molecular formula: C54H62CaN4O14S4
Molecular weight: 1159.4 g/mol
Exact mass: 1158.2771282 Da
Topological polar surface area: 315.0 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 16
Covalent units: 3
Defined stereocentres: 0

Also known as

Patent Blue VCarmine Blue VMerantine Blue VSolar Pure Blue VXSchultz No. 826Patent Blue V and LMitsui Acid Pure Blue VXNew Patent Blue A-CE Extra

16 more reported names

New Patent Blue Extra Pure ANSC 5010EINECS 222-573-8Patent Blue 5NSC 75430Alphazurine 2 G (C.I. 42051)8QE473DV1ZC.I. 712CI 42051C.I. 42051E 131CI FOOD BLUE 5ARIAVIT PATENT BLUE VPATENT BLUE V [FCC]m-Hydroxytetraethyldiaminotriphenylcarbinol anhydride disulfonic acid calcium saltINS NO.131

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External database identifiers

ChEBI:CHEBI:187511
EPA DTXSID:DTXSID00873918

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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