White Crystal Or White Powder Potassium acid phosphate MKP for Industrial Manufacturing Product Description: Potassium dihydrogen phosphate, also referred to as Monopotassium phosphate and commonly abbreviated as MKP, has the chemical formula KH 2 PO 4 . This compound appears as white crystals or a white powder, and is odorless and stable in air. It has a relative density of 2.338 and a melting point of 96℃. At 400℃, it undergoes a transformation to potassium pyrophosphate