... grade:1, Ammonium Sulphate 2, Nitrogen Content: 21% MIN3, Moisture: 0.3 % MAX4, Color: colorless5. Free Acid: 0.03 ... in alcohol, acetone,ammonia; easy to become caking after moisture absorption. Usage Mainly use in fertilizer, its advantage is less ... absorb moisture comparedto other fertilizer , also use in industry ,pharmaceuticals, ...