Dye / pH indicator
BROMPHENOL BLUE
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A brominated triphenylmethane dye more commonly used as a laboratory pH indicator than as an approved cosmetic colorant. Strongly coloured but flagged for skin and eye irritation in safety sheets.
Skin benefits
- Intense blue dye that can colour formulations at very low levels
- Useful as a pH indicator in laboratory and indicator-type products
- Functions effectively at micro-doses in coloured cosmetics
Known concerns
- Safety data sheets describe bromphenol blue as a skin, eye and ingestion irritant
- Contains four brominated phenolic groups, raising irritation potential
- Not part of the standard list of approved cosmetic CI colorants
- Limited regulatory positioning as a leave-on cosmetic ingredient
- Brominated phenol class has environmental concerns
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.