Specification Product Name NILE BLUE CHLORIDE Synonyms C.I. 51180 CAS NO. 2381-85-3 Molecular Formula C20H20CIN3O Formula Weight 353.85 Appearance Dark brownish green powder Structure     Tests    Limits Solubility 0.1% (50%EtOH) - Clear blue solution Absorptivity 1%/1cm, at λ max. 637.0 nm - Clear Red Solution Loss on drying at 110°C (1hr) - 2.25%         REVISED: 1-1-2012