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

Methylene Blue

Methylene Blue CI 52015; basic blue 9; C16H18ClN3S,xH2O = 319.9 (anhydrous) (7220-79-3)

Use a redox indicator grade suitable for biological work.

A hygroscopic, dark green or brown, crystalline powder.