MKP «Poluks Group», (also potassium dihydrogen phosphate, KDP, or monobasic potassium phosphate), KH2PO4, is a soluble salt of potassium and the dihydrogen phosphate ion which is used as a fertilizer, a food additive and a fungicide. It is a source of phosphorus and potassium.

The ratio of K2O to P2O5 is 34:52. Phosphorus contained in the fertilizer has a positive effect on the root system of crops, while potassium increases their resistance to stress conditions.