... insolubles,% ≤0.01--Note: When ammonium sulphate is used in agriculture,it is not necessary to check the content of Fe ... separation, drying. Used as food additives, as dough conditioner, yeast nutrients.4 )used in biochemistry, common salt, salting, salting initially ... covered containers, transfer to a safe placef waste disposal sites agriculture grade nitrogen fertilizer N 20.5% min ammonium sulphate