Title: Potassium Phosphate, Tribasic
CAS Registry Number: 7778-53-2
Additional Names: Tripotassium phosphate
Molecular Formula: K3O4P
Molecular Weight: 212.27
Percent Composition: K 55.26%, O 30.15%, P 14.59%
Line Formula: K3PO4
Literature References: Purification: Jänecke, Z. Phys. Chem. 127, 75 (1927); Simon, Schulze, Z. Anorg. Allg. Chem. 242, 331 (1939).
Properties: Deliquescent, orthorhombic crystals. d417 2.564. mp 1340°. Soly in water: 43.7% at 0°; 50.8% at 25°; 59.7% at 45.1°. Insol in alcohol. Aq solns are strongly alkaline.
Melting point: mp 1340°
Density: d417 2.564
Derivative Type: Octahydrate
Properties: Flat, rectangular platelets, mp 45.1°.
Melting point: mp 45.1°
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