Specifications
Appearance                 white  crystals
Potassium nitrate (KNO3),
%, min     99.90
Moisture content, %, max     0.20
Chlorides in terms of NaCl,
%, max     0.017
Insolubles, %, max     0.01
Potassium permanganate oxidizable substances
in terms of KNO3, %, max     0.01
Calcium and magnesium salts
in terms of Ca, %, max     0.002
Iron, %, max     0.005