Official EU label nameGlossary entry 3080

BASIC BROWN 16

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:26381-41-9

EC:247-640-9

Ingredient index records:

BASIC BROWN 16

Cosmetic functions: HAIR DYEING

[8-[(p-Aminophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride

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1 matched or reported name

BASIC BROWN 16

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name BASIC BROWN 16.

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 26381-41-9

CAS 26381-41-9PubChem CID 117785

Basic Brown 16

IUPAC name: [8-[(4-aminophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride

Molecular formula: C19H21ClN4O
Molecular weight: 356.8 g/mol
Exact mass: 356.1403890 Da
Topological polar surface area: 71.0 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 5
Covalent units: 2
Defined stereocentres: 0

Also known as

Arianor MahoganyUNII-QEJ5GK0TG1QEJ5GK0TG1C.I. 12250EINECS 247-640-9C.I. BASIC BROWN 16ARIANOR MAHOGANY 306002ARIANOR MAHOGANY-306002

16 more reported names

CI 122508-(4'-Aminophenylazo)-7-hydroxy-2-naphthyltrimethylammonium chloride2-Naphthalenaminium, 8-(2-(4-aminophenyl)diazenyl)-7-hydroxy-N,N,N-trimethyl-, chloride (1:1)2-Naphthalenaminium, 8-[2-(4-aminophenyl)diazenyl]-7-hydroxy-N,N,N-trimethyl-, chloride (1:1)RefChem:116618BASIC BROWN 16 [INCI]247-640-9[8-[(4-aminophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium;chloride2-Naphthalenaminium, 8-[(4-aminophenyl)azo]-7-hydroxy-N,N,N-trimethyl-, chloride8-((4-Aminophenyl)diazenyl)-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium chlorideArianor Mahogany (Technical Grade)Basic BrownAmmonium, (8-((p-aminophenyl)azo)-7-hydroxy-2-naphthyl)trimethyl-, chloride2-Naphthalenaminium, 8-((4-aminophenyl)azo)-7-hydroxy-N,N,N-trimethyl-, chloride8-[(4-Aminophenyl)diazenyl]-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium ChlorideBASICBROWN16

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External database identifiers

EPA DTXSID:DTXSID20874043

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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