Official EU label nameGlossary entry 858

ACID ORANGE 6

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:547-57-9

EC:208-924-8

Ingredient index records:

ACID ORANGE 6

Cosmetic functions: HAIR DYEING

Sodium 4-(2,4-dihydroxyphenylazo)benzenesulphonate (CI 14270)

Inventory restriction note: II/1330 (Acid Orange 6; CI 14270: when used as substance in hair dye products)

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1 matched or reported name

ACID ORANGE 6

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name ACID ORANGE 6.

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 547-57-9

CAS 547-57-9PubChem CID 2728027

C.I. Acid Orange 6

IUPAC name: sodium 4-[(2,4-dihydroxyphenyl)diazenyl]benzenesulfonate

Molecular formula: C12H9N2NaO5S
Molecular weight: 316.27 g/mol
Exact mass: 316.01298685 Da
Topological polar surface area: 131.0 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 7
Covalent units: 2
Defined stereocentres: 0

Also known as

RefChem:1080549Tropaeolin OACID ORANGE 6Resorcinol yellowChrysoineTropaeolinOChrysoine STropaeoline

16 more reported names

Resorcin yellowChrysoine ExtraTropaeoline OChrysonine STropaeolin RChrysoine NChrysonis SGold YellowResorcine YellowTropaelin-OTropeolin OChrysoin GSodium azoresorcinolsulfanilateYellow TCurol Orange GDermina Yellow G

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External database identifiers

EPA DTXSID:DTXSID70873925

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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