Specification Product Name TRYPAN BLUE Synonyms Diamine blue 3B; Niagara Blue 3B; Direct Blue 14 CAS NO. 72-57-1 C.I. NO. 23850 Molecular Formula C34H24N6Na4O14S4 Formula Weight 960.82 Appearance Dark Blackish Brown Powder Structure     Tests    Limits Solubility 0.1% (50%EtOH) - Clear Blue solution Absorption Max.(50% EtOH) - 605 Absorptivity at 1%/1cm, in 50%EtOH, at max. - 640 Loss On Drying (110°C) 1 hr - 3.49%         REVISED: 1-1-2012