Title: Potassium Phosphate, Monobasic
CAS Registry Number: 7778-77-0
Synonyms: Potassium biphosphate; potassium acid phosphate; potassium dihydrogen phosphate; monopotassium phosphate; S?rensen's potassium phosphate
Molecular Formula: H2KO4P
Molecular Weight: 136.09
Percent Composition: H 1.48%, K 28.73%, O 47.03%, P 22.76%
Line Formula: KH2PO4
Properties: Colorless crystals or white, granular powder; permanent in air; at 400° loses H2O, forming metaphosphate. d 2.34. Sol in ~4.5 parts water. Insol in alcohol. pH 4.4-4.7.
Density: d 2.34
Use: In buffers for determination of pH. Pharmaceutic aid (buffering agent).
