Tripotassium phosphate is a water-soluble ionic salt which has the chemical formula K₃PO₄. It is used as a food additive for its properties as an emulsifier, foaming agent, and whipping agent. In combination with fatty acids, it is a potential antimicrobial agent in poultry processing. As a fertilizer, its proportions of N, P₂O₅, and K₂O are 0-33-67.