AMMONIUM Sulphate

Moisture per cent by weight, maximum 1.0
Ammoniacal Nitrogen, per cent by weight, minimum 20.5
Sulphur (as S), per cent by weight, minimum 23.0
Free Acidity (as H2SO4 ) , per cent by weight, maximum 0.025
Arsenic as (As2O3), per cent weight, maximum 0.01