... phosphite (MPP) Appearance: white crystals K2O: 38.4% min, P2O5: 58.3% min Easily dissolved, soluble in water VLPF051-Mono potassium phosphite ... tech gradeMolecular formula: KH2PO3,Molecular weight: 120.07,Appearance: white crystals,Assay ... phosphine water treatment agent to reduce environmental pollution Mono potassium phosphite