Chinese name: potassium dihydrogen phosphate
English name: Potassium Phosphate Monobasic
CAS: 7778-77-0
EINECS number: 231-913-4
Molecular formula: H2KO4P
MDL number: MFCD00011401
Molecular weight: 136.09
Appearance: colorless to white crystal or crystalline powder, odorless. The relative density is 2.338. Soluble in water, insoluble in ethanol. Aqueous solutions are acidic, and 2.7% of aqueous solutions have a PH of 4.2-4.7. Stable in air. Adi0-70 mg/kg(FAO/WHO, 1994).
Solubility: Soluble in water (83.5g/100ml water at 90℃). Insoluble in alcohol.
Melting point: 252.6 °C(lit.)
Boiling point: > 450 °C
Density: 2.338 g/mL at 25 °C(lit.)
Vapor pressure: 0Pa at 25℃
Storage: Store at RT.
Solubility: H2O: 1.5M at 20 °C, clear, colorless
Form: powder
Specific gravity: 2.338
Color: white transparent
PH value: 4.2-4.6 (20g/l, H2O, 20℃)
Odor: Odorless
Acidity coefficient (pKa) : (1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
Water solubility: 222 g/L (20 ºC)
Decomposition: 253 °C
Sensitivity: hygroscopicity
Maximum wavelength (λmax) : λ: 260 nm Amax: 0.046
λ: 280 nm Amax: 0.040
Merck: 14,7659
Stability: hygroscopicity
InChIKey: gnsklfrgewLpaa-uhffFAOYSA-m
use
Used as fertilizer, flavoring agent, brewing yeast culture agent, for the preparation of buffer solution, but also used in medicine and the manufacture of potassium metaphosphate.