Export standards: BP2002, USP27. Characters: White crystalline or crystalline powder Degree of acidity: PH5. 5-6. 5 Chloride: 0. 01%Max Sulphate: 0. 02%Max P-aminephenol: 0. 005%Max Loss on drying: 0. 5%Max Heavy metals: 10PPM Max Assay: 98. 0-102. 0% Storage: Sunshade, hermetical store Package: 25Kg/drum or 25Kg/bag Website: Contact: Mr. Stonz Zhang Email: