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

Synonyms: Toluidine blue O (C.I. 52040) Certistain® Hill Formula: C₁₅H₁₆ClN₃S CAS Number: 92-31-9