Is BASIC YELLOW 40 safe to use in EU cosmetics?

BASIC YELLOW 40 is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What other records share CAS 29556-33-0?

CAS 29556-33-0 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains BASIC YELLOW 40?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 5482715/10/2010

BASIC YELLOW 40

2-[7-(Diethylamino)-2- Oxo-2H-1- Benzopyran –3-yl]-1,3-dimethyl-1H-Benzimidazolium Chloride

BASIC YELLOW 40 is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 29556-33-0

CAS 29556-33-0PubChem CID 169053

1H-Benzimidazolium, 2-(7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl)-1,3-dimethyl-, chloride (1:1)

IUPAC name: 7-(diethylamino)-3-(1,3-dimethylbenzimidazol-3-ium-2-yl)chromen-2-one chloride

Molecular formula: C22H24ClN3O2
Molecular weight: 397.9 g/mol
Exact mass: 397.1557047 Da
Topological polar surface area: 38.4 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 2
Defined stereocentres: 0

Also known as

EINECS 249-694-91H-Benzimidazolium, 2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-1,3-dimethyl-, chloride (1:1)RefChem:79708Basic Yellow 401H-Benzimidazolium, 2-(7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl)-1,3-dimethyl-, chloride7-(diethylamino)-3-(1,3-dimethylbenzimidazol-3-ium-2-yl)chromen-2-one;chloride1H-Benzimidazolium, 2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-1,3-dimethyl-, chloride2-(7-(Diethylamino)-2-oxo-2H-chromen-3-yl)-1,3-dimethyl-1H-benzo[d]imidazol-3-ium chloride

15 more reported names

C.I. Basic Yellow 40Basic Yellow XLCoumarin40Jaune basique 40Flavine 10GFFAmarelo Basico 40Basico Amarillo 40Fluorescent yellow 10GFF2-(7-(Diethylamino)-2-oxo-2H-1-benzopyran-3-yl)-1,3-dimethyl-1H-benzimidazolium chlorideCationic Brilliant Yellow 10GFFLCVNGSHJQQOSDB-UHFFFAOYSA-MHY-D1129AS-17156CS-01358372-[7-(Diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-1,3-dimethyl-1H-1,3-benzimidazol-3-ium chloride

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID90904366

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for BASIC YELLOW 40

INCI name

BASIC YELLOW 40

Description

2-[7-(Diethylamino)-2- Oxo-2H-1- Benzopyran –3-yl]-1,3-dimethyl-1H-Benzimidazolium Chloride

Record provenance

Inventory reference: 54827
Imported identity: BASIC YELLOW 40
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for BASIC YELLOW 40

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Key data

CAS

29556-33-0

249-694-9

Restriction

—

Function

HAIR DYEING: Imparting color to hair. Hair dyeing preparations may be temporary, semi-permanent, or permanent, depending on the length of time the colorant remains on the hair.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#3107 · BASIC YELLOW 40

Ingredients with overlapping formulation functions

BASIC VIOLET 3HAIR DYEING

BASIC VIOLET 4HAIR DYEING

BASIC YELLOW 11HAIR DYEING

BASIC YELLOW 28HAIR DYEING

BASIC YELLOW 57HAIR DYEING

BASIC YELLOW 87HAIR DYEING

BETA VULGARIS ROOT POWDERANTIOXIDANT, BINDING, HAIR DYEING

BIS(C13-15 ALKOXY) PG-AMODIMETHICONEHAIR CONDITIONING, HAIR DYEING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox 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

How BASIC YELLOW 40 appears in the CosIng inventory

The CosIng inventory lists BASIC YELLOW 40 as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

BASIC YELLOW 40 is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

BASIC YELLOW 40 is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, BASIC YELLOW 40 carries the following function designation(s):

HAIR DYEING

CAS 29556-33-0 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for BASIC YELLOW 40

This page reproduces the CosIng inventory entry for BASIC YELLOW 40 from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research BASIC YELLOW 40 and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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