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BASIC VIOLET 1

CAS 8004-87-3
32

Safety score · 0–100

Caution

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

About

Also known as crystal violet or gentian violet, this triarylmethane dye is restricted to hair dye use only in the EU (Annex II/388) due to concerns around bacterial resistance, genotoxicity, and potential carcinogenicity of triarylmethane compounds.

Basic Violet 1 (crystal violet, CI 42535, gentian violet) is a synthetic triarylmethane dye historically used as an antiseptic and food colouring, now restricted in cosmetics. EU Annex II entry 388 prohibits its use except solely for hair dyeing purposes, where it may be used subject to maximum concentration limits and cautionary labelling. Triarylmethane dyes have been associated with photosensitivity reactions, bacterial resistance patterns (due to its antimicrobial properties), and some in vitro genotoxicity concerns. Its use in cosmetic skin products (e.g., soaps, deodorants) is explicitly prohibited in the EU.

Known concerns

  • EU Annex II/388 restricted — hair dye use only
  • Triarylmethane dyes: photosensitivity reactions documented
  • Potential genotoxicity in vitro
  • Prohibited in leave-on skin products (soaps, deodorants, body care)
  • Antimicrobial resistance concerns from biocide use

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 — always read the physical product label and consult a healthcare professional for personal concerns.