... .0%,free water<0.2%,free acid(H2SO4)<0.03%,iron(Fe)content<0.007% Ammonium Phosphate ASMajor Technical Specifications: Nitrogen(N)content≥21.0%,free water≤0.2%,free ... acid(H2SO4)≤0.03%,iron(Fe)content≤0.007%,arsenic content(AS)≤0.00005%,heavy metal(Pb ...