Official EU label nameGlossary entry 848

ACID BLUE 74 ALUMINUM LAKE

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:16521-38-3

EC:240-589-3

Ingredient index records:

ACID BLUE 74 ALUMINUM LAKE

Cosmetic functions: HAIR DYEING

2-(1,3-Dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-indole-5-sulfonic acid aluminium complex (CI 73015)

Inventory restriction note: IV/99

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1 matched or reported name

ACID BLUE 74 ALUMINUM LAKE

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name ACID BLUE 74 ALUMINUM LAKE.

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 16521-38-3

CAS 16521-38-3PubChem CID 61842

C.I. Pigment Blue 63

C.I. Pigment Blue 63 is a member of hydroxyindoles. — ChEBI

IUPAC name: aluminum 2-(3-hydroxy-5-sulfo-1H-indol-2-yl)-3-oxoindole-5-sulfonic acid

Molecular formula: C16H10AlN2O8S2+3
Molecular weight: 449.4 g/mol
Exact mass: 448.9693960 Da
Topological polar surface area: 191.0 Å²
Hydrogen-bond donors: 4
Hydrogen-bond acceptors: 9
Covalent units: 2
Defined stereocentres: 0

Also known as

RefChem:572495C.I. Food Blue 1-aluminum lake1342-11-6Certolake indigo carmineIndigotine-aluminum lakealuminum;2-(3-hydroxy-5-sulfo-1H-indol-2-yl)-3-oxoindole-5-sulfonic acidC.I. Food Blue 1:1Indigo carmine-aluminum lake

16 more reported names

Japan Blue 2 Aluminum lakeAcid Blue 74-aluminum lakeJapan Food Blue No. 2 aluminum lakeC.I. 73015 Aluminum lakeC.I. 73015-Aluminum lakeFood Blue No. 2-aluminum lakeC.I. Acid Blue 74-aluminum lakeEINECS 240-589-3Indigo disulfonic acid, aluminum saltFD&C Blue No. 2-aluminum lakeAluminum 3,3'-dioxo-(delta2,2-biindoline)-5,5'disulfonate(delta2,2-Biindoline)-5,5'-disulfonic acid, 3,3'-dioxo-, aluminum saltCHEBI:172686INHYHTBURMMHBG-UHFFFAOYSA-NPigment Blue 63 (Food Blue 1:1)(Z)-3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonic acid, aluminum(III) salt

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External database identifiers

ChEBI:CHEBI:172686

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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