ITEMSTANDARDContent (NH4HSO4)98.5%-100.5%Content (as H2SO4)41.5%-43.5%Water Insoluble≤0.01%Loss on Ignition≤0.01%Cloride (Cl)≤0.0005%Nitrate (NO3)≤0.002%Fe≤0.0005%Pb≤0.001%