Certified by the Biological Stain Commission Synonyms: Basic Blue 17, Blutene chloride, Methylene Blue T50 or T extra, Tolonium chloride Formula: C₁₅H₁₆ClN₃S (vs air) Molecular Weight : 305.83

Formula: C₁₅H₁₆N₃S•Cl Formula Weight: 305.83 CAS Number: 92-31-9 Synonym(s): Basic Blue 17