Characteristic

Dipotassium phosphate (K₂HPO₄) (also dipotassium hydrogen orthophosphate; potassium phosphate dibasic) is the inorganic compound with the formula K₂HPO₄.(H₂O)x (x = 0, 3, 6). 

Chemical formula:K₂HPO₄

Molar mass:174.2 g/mol

Appearance:white powder deliquescent

Odor:odorless

Density:2.44 g/cm₃

Melting point:> 465 °C (869 °F; 738 K) decomposes

Solubility in water:149.25 g/100 mL (20 °C)

Solubility:slightly soluble in alcohol

Acidity (pKa):12.4

Basicity (pKb):6.8

Application

Potassium hydrogen phosphate is used as a fertilizer, food additive, buffering agent, in molecular biology, biochemistry and chromatography. It is useful to increase the partition coefficients of amino acids in aqueous two-phase systems. It plays an important role for increase in rice grain yield by spraying chemicals including ferric chloride, di-potassium hydrogen phosphate and salicylic acid.