Potassium dihydrogen phosphate

Potassium dihydrogen phosphate Identification Name Potassium dihydrogen phosphate Synonyms Potassium dihydrogen orthophosphate; Potassium phosphate; Monopotassium phosphate Molecular Formula KH2PO4 Molecular Weight 136.08 CAS Registry Number 7778-77-0 EINECS 231-913-4 Properties Density 2.338 Melting point 252.6 ºC Water solubility 222 g/L (20 ºC) Appearance: white powder Properties: Colorless sifang crystals or white crystalloid powder. The relative density 2.338. Melting point 252.6 °C. Soluble in water (90 °C for improve g / 100ml canister water), become acidic aqueous solution, 1% linsuanerqingjia solution pH value is 4.6. Not soluble in alcohol. Have ChaoXie sex. Heating and 400 °C melted and transparent liquid, after cooling curing is not transparent glass shape partial potassium phosphate. Use: Analytics reagents, such as configuration standard solution, buffer a PH. Also used in the pharmaceutical industry, piezoelectric element and electric optical components production. Details: Test item Specification Reagent grade Pharmaceutical grade Appearance Conform Conform Assay [KH2PO4]/% ≥99.5 ≥99.0 Clarify degrees test Conform Conform Water insoluble/% ≤0.002 ≤0.005 Dry weightlessness /% ≤0.2 ≤0.3 Chloride (Cl)/% ≤0.001 ≤0.005 Sulfate (SO4)/% ≤0.003 ≤0.005 N/% ≤0.001 ≤0.002 Sodium (Na)/% ≤0.02 ≤0.05 Ferric (Fe)/% ≤0.001 ≤0.005 Arsenic (As) /% ≤0.0005 ≤0.002 Heavy metal (Pb)/% ≤0.001 ≤0.005