Specifications:1) Quality grade: FCC (IV)2) Assay (dry basis): 98.0 - 101.0%3) Appearance: white or yellow granules4) Acidity (ascorbic acid): passes test (about 1%)5) Free alkali (as K2CO3): passes test (about 1%)6) Loss on drying: 1.0% (max.)7) Heavy metals (as Pb): 10ppm (max.)8) Arsenic (as As): 3ppm