Potassium phosphate monobasic, buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%

Anion Traces: sulfate (SO₄^2-): ≤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)