Auramin(O) 100 gm C17H22N3Cl M.W. 303.84  Absorption Max 429-433nm Absorptivity (A 1%/1cm , Abso. max pH 6.0 on dried substance) min 900.0 Loss on drying(105oC) max 10.0% Suitability for microscopy passes test (Biological Stain, forms a highly fluorescent complex with horse liver