Dipotassium phosphate

Dipotassium phosphate (K2HPO4) (also dipotassium hydrogen orthophosphate; potassium phosphate dibasic) is the inorganic compound with the formula K2HPO4.(H2O)x (x = 0, 3, 6). Together with monopotassium phosphate (KH2PO4.(H2O)x), it is often used as a fertilizer, food additive, and buffering agent. It is a white or colorless solid that is soluble in water.

It is produced commercially by partial neutralization of phosphoric acid with two equivalents of potassium chloride:
 * H3PO4 + 2 KCl → K2HPO4 + 2 HCl

Uses
As a food additive, dipotassium phosphate is used in imitation dairy creamers, dry powder beverages, mineral supplements, and starter cultures. It functions as an emulsifier, stabilizer and texturizer; it also is a buffering agent, and chelating agent especially for the calcium in milk products..

As a food additive, dipotassium phosphate is generally recognized as safe by the United States Food and Drug Administration, and is commonly used (in conjunction with other inorganic salts) to add taste to bottled water.