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MONOPOTASSIUM PHOSPHATE (Tech Grade)
(CAS No.: 7778-77-0)
Executive Standard: HG/T2321-1992
Chemical Formula: KH2PO4
Molecular Weight: 136.09
[Physical properties] White or colorless crystals; It is soluble in water easily; PH of 1% solution is 4.5; the density is 2.338, and melting point is 252.6; insoluble in ethanol, hygroscopic and deliquescence.
[Quality specification]
Items | Standard |
Main contents (as KH2PO4 dry basis) %≥ | 98.0 |
Phosphorus pentoxide (as P2O5) %≥ | 51.5 |
Potassium oxide (as K2O) %≥ | 33.9 |
PH of 1% water solution | 4.3-4.7 |
Moisture %≤ | 0.2 |
Heavy metals (as Pb) %≤ | 0.005 |
Arsenic (as As) %≤ | 0.005 |
Fluoride (as F) %≤ | 0.2 |
Water insoluble %≤ | 0.10 |


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