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Colorant

BASIC BLUE 3

CAS 33203-82-6
18

Safety score · 0–100

Avoid

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A cationic phenoxazine hair dye. Carries GHS warnings for acute toxicity, serious eye damage, and severe aquatic toxicity. EU regulates basic dyes in cosmetics; use only at restricted levels.

Function

HAIR DYEING

Skin benefits

  • Used as a hair dye colorant

Known concerns

  • GHS H318 causes serious eye damage
  • H301 toxic if swallowed and H302 harmful if swallowed
  • H410 very toxic to aquatic life with long-lasting effects
  • EU restricts use of basic dye colorants in cosmetics
  • Sensitization concerns for the basic dye class

References

EU

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.