Vinblastine Sulfate Appearance:White or off-white crystalline powder Identification:conforms PH:3.5 to 5.0 Loss on drying:15.0%max. Related substance:Individual Impurity 1.0% max. Total Impurities:3.0% max. methyl: 3000ppm max. ethanol:5000ppm max. dichloromethane:600ppm max. chloroform:6000ppm max. Assay(on dried basis):96.0?02.0%