Is Bromothymol Blue safe in cosmetics?
Bromothymol Blue has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Moderate
Cosmetic Ingredient
Bromothymol Blue
INCI: BROMOTHYMOL BLUE
Bromothymol Blue (CAS 76-59-5 (free acid); 34722-90-2 (sodium salt)) is a cosmetic cosmetic ingredient functioning as Hair colorant (non-oxidative hair dye). EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database.
View industrial chemical safety profile for CAS 76-59-5 (free acid); 34722-90-2 (sodium salt) →
Auto-generated CPSR Part A draft with source citations
Function
Hair colorant (non-oxidative hair dye)
Safety Rating
MODERATE
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Not calculable — SCCS noted SED exceeds TTC threshold for Cramer Class III; no repeat-dose NOAEL available
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Bromothymol Blue.
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
Expert safety assessment and concern-level summary for Bromothymol Blue.
Regulatory Flags
colorant
eu_cosing_listed
Frequently Asked Questions
Is Bromothymol Blue allowed in the EU?
Bromothymol Blue EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Bromothymol Blue do in cosmetics?
Bromothymol Blue functions as: Hair colorant (non-oxidative hair dye). It is classified as a cosmetic ingredient in our database. CAS number: 76-59-5 (free acid); 34722-90-2 (sodium salt).
Compliance Tools
Check Bromothymol Blue compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
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Substance Compliance
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MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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