Character:White crystalline powder Appearance of Solution:Clear Identification:Meets BP2002/USP27 Standard Melting Point:125--128oC Acidity:0.1mg/g max Loss on drying:0.5% max Sulphate Ash:0.1% max Residue 0.1% max Heavy metal:10ppm max Related Substances:Ultraviolet at 254nm passed Organic Volatile Impurities:Meets BP2002/USP27 Standard Assay:99.0% -- 101.0%