Regulatory Status
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Safety Data
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Expert Verdict
SCCS explicitly stated safety cannot be confirmed due to SED exceeding Cramer III TTC threshold and lack of repeat-dose NOAEL data. Purity varies significantly between suppliers (90–97%) with impurities including thymol blue and mono-brominated isomers.
Regulatory Flags
Frequently Asked Questions
Is Bromothymol Blue safe in cosmetics?
SCCS explicitly stated safety cannot be confirmed due to SED exceeding Cramer III TTC threshold and lack of repeat-dose NOAEL data. Purity varies significantly between suppliers (90–97%) with impurities including thymol blue and mono-brominated isomers. The EU classifies Bromothymol Blue as "permitted". Safety rating: MODERATE.
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).
What is the Margin of Safety for Bromothymol Blue?
not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.
Compliance Tools
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Related Ingredients
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