... white crystal ,low heavy metals, ISO9001 certified supplier monopotassium phosphate ( mkp ), potassium dihydrogen phosphate is white crystal ,low heavy metals, ISO9001 certified ... , melting point at 252.6°C , and PH value of 1% solution is 4.5.Uses:Used to manufacture metaphosphate in ... % ≥51.5051.503Potassium oxide (K2O) % ≥34.034.04PH value of 1% solution4.3-4.74.3-4.75Moisture % ≤0.200.206Heavy ...