Official EU label nameGlossary entry 27213

SOLVENT RED 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:6535-42-8

EC:229-439-8

Ingredient index records:

SOLVENT RED 3

Cosmetic functions: HAIR DYEING

4-[(4-Ethoxyphenyl)azo]naphthol (CI 12010)

Inventory restriction note: II/1344 (Solvent Red 3; CI 12010: and its salts when used as a substance in hair dye products)

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1 matched or reported name

SOLVENT RED 3

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name SOLVENT RED 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 6535-42-8

CAS 6535-42-8PubChem CID 81021

1-Naphthalenol, 4-[(4-ethoxyphenyl)azo]-

IUPAC name: 4-[(4-ethoxyphenyl)diazenyl]naphthalen-1-ol

Molecular formula: C18H16N2O2
Molecular weight: 292.3 g/mol
Exact mass: 292.121177757 Da
XLogP3: 4.9
Topological polar surface area: 54.2 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

Solvent red 3Fat Brown BC.I. Solvent Red 3CI 120101-Naphthalenol, 4-((4-ethoxyphenyl)azo)-4-((4-Ethoxyphenyl)diazenyl)naphthalen-1-olXNW2E182071-Naphthalenol, 4-(2-(4-ethoxyphenyl)diazenyl)-

13 more reported names

4-[(1E)-2-(4-ethoxyphenyl)diazen-1-yl]naphthalen-1-olUNII-XNW2E18207EINECS 229-439-8CERES BROWN B4-((4-Ethoxyphenyl)azo)-1-naphthalenolFat brown b, technical gradeMSK58904-((4-Ethoxyphenyl)azo)naphtholJSEYDVLGSMLKDL-UHFFFAOYSA-NBRUN FONCE AU GRAS W 82014-[(4-ethoxyphenyl)diazenyl]-alpha-naphthol4-((4-ETHOXYPHENYL)AZO)-1-NAPHTHOL(4E)-4-[(4-ethoxyphenyl)hydrazono]naphthalen-1-one

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External database identifiers

EPA DTXSID:DTXSID6064402

Retrieved from NIH PubChem on 2026-09-02 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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