Purity: 99.0% min by wt
Ca & Magnesium: 0.15% max by wt
Fe: 0.002% max by wt
Water Insolubility: 0.05% max by wt
Moisture: 0.2% max by wt
Chloride (As Cl): 0.35% max by wt
Whiteness: 80% min
PH Value: 5-9