сульфат аммония-

Used as materials for producing hydrogen peroxide, ammonia alum and ammonium chloride in chemical industry; flux in jointing industry; fireproof agent in textile industry; additive of plating bath in plating industry; nitrogenous in agricultural industry. Applicable to common soil and crops. Food-grade products are used as dough regulators and yeast nutrition. ItemStandard Test result Excellent Grade First-class goods Qualified products Nitrogen Content % ≥2121.020.521.1Moisture %≤0.30.31.00.1Free acidity(H2SO4) %≤0.030.050.200.03 Fe content %≤0.007//0.002 Arsenic content % ≤0.00005//0.00001 Heavy metal % ≤0.005//0.005Water-insoluble content %≤ 0.01 //0.004