• British Pharmacopoeia Volume IV
  • Appendices
  • Appendix I A. General Reagents

Crystal Violet
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Crystal Violet CI 42555; basic violet 3; C25H30ClN3  =  408.0 (548-62-9)

When used for titration in non-aqueous media, it changes from violet (basic) through bluish green (neutral) to yellowish green (acidic).