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Colorant

ACID BLUE 3

CAS 3536-49-0
45

Safety score · 0–100

Moderate

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

Patent Blue V, a triphenylmethane dye used as a cosmetic blue colorant. Mostly safe in rinse-off cosmetics but a documented allergen in medical injection use.

Function

HAIR DYEING

Skin benefits

  • Bright blue cosmetic colorant
  • Approved for rinse-off use in EU
  • Long history in cosmetics and food

Known concerns

  • Triphenylmethane dye — anaphylaxis case reports in medical use
  • Restricted in some markets
  • Possible sensitiser

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.