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

Toluidine Blue
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Toluidine Blue Toluidine blue O; CI 52040; 3-amino-7- dimethylamino-2-methylphenothiazin-5-ium chloride; C15H16ClN3S = 305.8 (92-31-9)

General reagent grade of commerce.

A dark green powder.