... :KH2PO3, Molecular Weight:120.07, Appearance :white crystal, Assay:98.0% min, P2O5: 58.3% min, K2O: 38.4% min, ... Cl:0.01% max, PO4:0.2% max, Moisture:0.1% max ,Fe (mg/kg):50 max ... Heavy metal (mg/kg):50 max, Insoluble matter :0.3% max, pH :4.0-5.0Packing:25kgs plastic woven bag, 24MTs/20'FCL ... of 52% P2O5 and 34% K2O, and is labeled 0-52-34. MKP is often used as a nutrient source ...