7658. Potassium Phosphate, Dibasic

Nomenclature

CAS number: 7758-11-4
Phosphoric acid potassium salt (1:1); dipotassium phosphate; dikalium phosphate; DKP; dipotassium hydrogen phosphate.
HK2O4P; mol wt 174.18.
H 0.58%, K 44.89%, O 36.74%, P 17.78%.
K2HPO4.

Properties

White, somewhat hygroscopic granules. Very sol in water, slightly in alcohol. 100 g will dissolve rapidly and completely in 67 g of cold water. Converted into pyrophosphate by ignition. The aq soln is slightly alkaline to phenolphthalein. Keep well closed.

Use

Buffering agent in antifreeze solns; nutrient in the culturing of antibiotics; ingredient of instant fertilizers; as sequestrant in the prepn of non-dairy powdered coffee creams.

Therapeutic Category

Cathartic.

Keywords

Laxative/Cathartic