Official EU label nameGlossary entry 6401

CI 42090

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.

0 markets with evidence

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Resolved identifiers

Resolved substance identity

CAS:3844-45-9

EC:223-339-8

Ingredient index records:

CI 42090

Cosmetic functions: COLORANT, HAIR DYEING

Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt

Inventory restriction note: IV/63 (CI 42090) III/190 (Acid Blue 9; Acid Blue 9 Ammonium Salt; Acid Blue 9 Aluminum Lake)

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1 matched or reported name

CI 42090

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name CI 42090.

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 3844-45-9

CAS 3844-45-9PubChem CID 19700

FD&C Blue No. 1

Brilliant Blue is an organic molecular entity. — ChEBI

IUPAC name: disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]benzenesulfonate

Molecular formula: C37H34N2Na2O9S3
Molecular weight: 792.9 g/mol
Exact mass: 792.12218275 Da
Topological polar surface area: 203.0 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 10
Covalent units: 3
Defined stereocentres: 0

Also known as

Brilliant Blue FCFBrilliant BlueBlue 1206FD & C Blue no. 1Fenazo Blue XIJapan Blue 1Merantine Blue EGCosmetic Blue Lake

16 more reported names

Hexacol Brilliant Blue ABrilliant Blue FCF supraJapan Blue No. 1Intracid Pure Blue LUsacert Blue No. 1FDC Blue No. 1Food Blue Dye No. 1Modr Kysela 9Aizen Food Blue No. 2Modr Brilantni FCFblue no. 1C.I. ACID BLUE 9, DISODIUM SALTCanacert Brilliant Blue FCFModr Potravinarska 2Usacert FD and C Blue No. 1D&C Blue No. 1

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External database identifiers

ChEBI:CHEBI:82411
ChEMBL:CHEMBL3184128
EPA DTXSID:DTXSID2020189

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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