How is dipotassium phosphate made and is there a difference in price between liquid and powder forms?

Dipotassium phosphate (sometimes abbreviated DKP) has the chemical formula K2 H PO4, and is made by reacting appropriate amounts of potassium hydroxide (KOH) or potassium oxide (K2O) with phosphoric acid (H3PO4). Pure DKP is a slightly hygroscopic (meaning it tends to attract water from the atmosphere) white powder. It is commonly used as a fertilizer.





Any liquid form you find for sale will simply be a solution of the pure powder in water or other solvent. DKP is readily soluble in water to the level of about 1.5 grams DKP per gram of water. The liquid form will almost certainly be more expensive in terms of the amount of actual DKP you get per dollar, as well as in terms of shipping costs. (You probably don't want to pay to ship the weight of the water in the solution.)