Item Specifiactions
Nitrogen (N) content (dry basis) % ≥ 21.0
Moisture(H2O) % ≥ 0.5
Free acid(H2SO4) % ≥ 0.08
Iron(Fe) % ≥ 0.007
Arsenic(As) % ≥ 0.00005
Heavy metal(Pb) % ≥ 0.005
Water insoluble % ≥ 0.05
Appearance: White powder