Item
Standard
Test result
Nitrogen % ≥
20.5
21
Sulfur % ≥
23
23.6
Moisture % ≤
1.5
1
Free acidity (H2SO4) % ≤
0.2
0.1
Appearance
White/off white, color not stable
Formulae
（NH4）2SO4
Molecular weight
132.14
CAS
7783-20-2
Properties
White or off-white fine crystalline powder. Easily soluble in water. Aqueous solution appears acid. Insoluble in alcohol, acetone and ammonia. Easily deliquescent and volatilized in the air. Slight odor of ammonia.
Uses
Use to soil land directly
Mixed with other granulars as BB or NPK fertilizer
Storage
As with most solid fertilizers, Ammonium Sulphate can be stored over a season as long as it is kept in a cool, dry, well ventilated area.