Monopotassium phosphate or MKP (also known as potassium dihydrogen phosphate, KDP or monobasic potassium phosphate). It is a soluble salt consisting of potassium and a hydrogen phosphate ion. Its chemical formula is KH2PO4.
The compound is used in fertilizers, food additives and fungicides. The compound is a source of phosphorous and potassium. It is also used as an agent to maintain PH. When it is used in fertilizer mixtures with urea and ammonia phosphate, the compound reduces ammonia leakage by maintaining a relatively low pH level.