Purity: (same/more than) 98.0%
Insoluble In Dilute HCl: (same/less than) 0.02%
Chloride: (same/less than) 0.002%
Nitrate: (same/less than) 0.005%
Carbonate: To Pass Test
Heavy Metals (as Pb): (same/less than) 0.002%
Iron: (same/less than) 0.001%
Magnesium and Alkali Salts: (same/less than) 0.2%
Potassium: (same/less than) 0.005%