Potassium dihydrogen phosphate (MKP)

Alias: monopotassium phosphate
CAS No. :7778-77-0
Molecular formula: KH2PO4
MW: 136.08

Character: colorless cubic crystallization or white crystal powder,Melting point is 252.6 ℃. The relative density is 2.338,and it dissolves in water. Its aqueous solution is acidity. But doesn’t dissolves in ethanol.Heat it up to 400 centirade, melts and becomes transparent liquid. After efrigerating, it become opaque potassium metaphosphate. And it is easy to deliquesce.

Uses: used as a fertilizer, flavoring agent, brewing yeast culture agent,and used in medicine and manufacturing of potassium meta-phosphate.

Quality standard(reference standard)
Specification Index
Agriculture grade Technical grade Food grade
Main Content (KH2PO4) %≥ 96.00 98.00 98.00
P2O5 %≥ 50.10 51.20 52.00
K2O %≥ 31.80 33.50 34.00
PH value 4.4-4.6 4.4-4.6 4.4-4.6
Chloride (Cl-) % ≤ ----- 0.20 0.10
Fe % ≤ ----- 0.003 0.003
F % ≤ ----- ----- 0.001
As % ≤ ----- 0.005 0.0003
Heavy metal（Pb） % ≤ ----- 0.005 0.001
Water Insoluble % ≤ ----- 0.30 0.20
Moisture % ≤ 1 0.50 0.20