Specification Product Name SAFRANINE O Synonyms Basic Red 2; 3,7-diamino-2,8-dimethy l-5- phenylphenazinium chloride CAS NO. 477-73-6 C. I. No. 50240 Molecular Formula C20H19CIN4 Formula Weight 350.85 Appearance Dark Green Crystalline Powder Structure     Tests    Limits Solubility 0.1% (50%EtOH) - Clear orange red solution Absorptivity 1%/1cm at λ max. 532.0nm - >1400 Loss on drying at 110°C (1hr) - <15%         REVISED: 1-1-2012