Appearance: almost white powder Identification: complies Crystallinity: complies Moisture content: 6.0-9.0% Ph value: 5.0-7.5 Purity ( on dry basis): 90.0-102.0% Heavy metals(Pb): max 10ppm Pb: max 5ppm As: max 3ppm Hg: max 1ppm Total bateria: max 100cfu/gram E.coli: negative Salmonella: negative The quality complies with USP30 standard