Is Basic Yellow 40 safe in cosmetics?
Basic Yellow 40 has a safety rating of "MODERATE" in our database. EU status: prohibited. US status: permitted.
Moderate
Cosmetic Ingredient
Basic Yellow 40
Also known as: 1H-Benzimidazolium, 2-(7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl)-1,3-dimethyl-, chloride (1:1)
INCI: BASIC YELLOW 40
Basic Yellow 40 (CAS 29556-33-0) is a cosmetic cosmetic ingredient functioning as Hair dyeing (semi-permanent cationic dye). EU Regulation 1223/2009 status: prohibited. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 29556-33-0 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Basic Yellow 40 is prohibited in EU cosmetics but has active industrial GHS classifications (H302, H319).
Source: Cosmetics: ingredients.eu_status; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Hair dyeing (semi-permanent cationic dye)
Safety Rating
MODERATE
Regulatory Status
EU EU Status
prohibited
US US Status
permitted
US Notes
Exempt under coal-tar hair dye provision; caution labeling required
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Basic Yellow 40.
Calculate MoS for your specific formulation with the MoS Calculator.
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1,000 - 10,000 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Expert Verdict
Expert safety assessment and concern-level summary for Basic Yellow 40.
Known Synonyms
1H-Benzimidazolium, 2-(7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl)-1,3-dimethyl-, chloride (1:1)
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Basic Yellow 40 allowed in the EU?
Basic Yellow 40 EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.
What does Basic Yellow 40 do in cosmetics?
Basic Yellow 40 functions as: Hair dyeing (semi-permanent cationic dye). It is classified as a cosmetic ingredient in our database. CAS number: 29556-33-0.
Is Basic Yellow 40 used outside cosmetics?
Basic Yellow 40 also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Basic Yellow 40 have different safety status in cosmetics vs industrial chemicals?
Basic Yellow 40 is prohibited in EU cosmetics but has active industrial GHS classifications (H302, H319).
Compliance Tools
Check Basic Yellow 40 compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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