Official EU label nameGlossary entry 17224

NAPHTHAZARIN

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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Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:475-38-7

EC:207-495-4

Ingredient index records:

NAPHTHAZARIN

Cosmetic functions: COLORANT; HAIR CONDITIONING

Naphthazarin is the organic compound that conforms to the formula

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1 matched or reported name

NAPHTHAZARIN

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name NAPHTHAZARIN.

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 475-38-7

CAS 475-38-7PubChem CID 10141

Naphthazarin

Naphthazarin is a naphthoquinone that is 1,4-naphthoquinone in which the hydrogens at positions 5 and 8 are replaced by hydroxy groups. It has a role as a geroprotector, an acaricide, an antibacterial agent, an antineoplastic agent, an apoptosis inducer and a plant metabolite. — ChEBI

IUPAC name: 5,8-dihydroxynaphthalene-1,4-dione

Molecular formula: C10H6O4
Molecular weight: 190.15 g/mol
Exact mass: 190.02660867 Da
XLogP3: 1.8
Topological polar surface area: 74.6 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

5,8-Dihydroxy-1,4-naphthoquinoneNaphthazarineNaphthazarone5,8-Dihydroxynaphthoquinone5,8-Dihydroxy-1,4-naphthalenedione5,8-Dihydroxy-1,4-naphthosemiquinoneS9IX5I5C0K1,4-NAPHTHOQUINONE, 5,8-DIHYDROXY-

16 more reported names

1,4-Naphthalenedione, 5,8-dihydroxy-CHEBI:28849NSC-26647NSC-3445555,8-dioxy-1,4-naphthoquinoneRefChem:831987207-495-4NAPHTHAZALIN5,8-Dihydroxy-[1,4]naphthoquinoneHY-N7526AS-76136CS-0132365doi:10.14272/RQNVIKXOOKXAJQ-UHFFFAOYSA-N.1DihydroxynaphthoquinoneNAPTHAZARIN NPHZ5,4-naphthosemiquinone

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External database identifiers

ChEBI:CHEBI:28849
ChEMBL:CHEMBL274056
EPA DTXSID:DTXSID00197161
PubMed:31301289
PubMed:26558468
PubMed:22908577
PubMed:22513651
PubMed:21873994
PubMed:21765926
PubMed:19220002
PubMed:18924186
PubMed:16526275
PubMed:16359837
PubMed:15871734
PubMed:15649814

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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