Use:Can directly used to chemical fertilizer, can also used for manufacturing compound fatty, sulfuric acid potassium, chlorinat ITEM High qulityFirst glassQulified(NITROGEN),≥21.021.020.5(FREE ACID),≤0.20.31.0(H2SO4),≤0.030.050.20(Fe),≤0.0070.007 (As),≤0.00005 (pb),≤0.005 ,≤0.01 ammonia sulphate