Product : Azure A C.A.S. No. : 531-53-3 C.I. No. : 52005 M.F. : C14H14CIN3S M.W. : 291.80gm/mole Specifications: Dye Content (by Spectrophotometry) = >75% Solubility 0.1% (Dist. Water) = Clear solution Absorption Maximum (Dist. Water)? max = 628-633nm Absorptivity (A1%, 1cm in Water, at max on dried substance) = >1120 Loss On Drying (110C) =