Synonyms: Monopotassium phosphate; Potassium dihydrogen phosphate; prim.-Potassium phosphate
Molecular Formula: H2KO4P
Molecular Weight: 136.09
Linear Structural Formula: KH2PO4
MDL Number: MFCD00011401
Purity: 99.5-100.5%
Melting Point: 252.6 C (lit.)
Density: 2.338 g/mL at 25 C (lit.)
Anion Traces: sulfate (SO42-): ≤30 mg/kg
Assay: 99.5-100.5%
Cation Traces: Co: ≤5 mg/kg
Density: 2.338 g/mL at 25°C(lit.)
Grade: puriss. p.a.
Impurities: ≤0.001% total nitrogen (N)
Loss: ≤0.2% loss on drying, 105 °C
MP: 252.6°C(lit.)
pH: 4.2-4.5 (20°C, 5%)
pKa (25°C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)