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Potassium Phosphite Solution


Synonyms: Mixture of monopotassium phosphite and dipotassium phosphite wate solution
CAS No.: KH2PO3: 13977-65-6   K2H2PO3: 13492-26-7
Molecular Weight: KH2PO3:120.078  K2H2PO3: 158.18
Molecular Formula: Mixture of KH2PO3, K2HPO3 and water
Structural Formula:monopotassium phosphite+dipotassium phosphite


Potassium phosphite solution can be obtained by neutralization reaction between phosphorous acid (H3PO3) and potassium hydroxide (substitution is potassium carbonate, which the reaction will give out a lot of carbon dioxide gas)


1) Potassium phosphite solution is used as foliar fertilizer and water-soluble fertilizer.
2) Potassium phosphite is used as fungicide to control Oomycetes (esp. Phytophthora sp), similar to fosetyl aluminium (Aliette).


Item Specification
Monopotassium Phosphite 0~56%
Dipotassium Phosphite 0~56%
K2O 21.9~33.4%
P2O5 33.1%~25.1%
water Balance
Chloride (Cl) 0.01% max.
Iron (Fe) 0.002% max.
Pb 0.001% max.
As 0.001% max.
Cd 0.0005% max.
Insolubles in water 0.01% max.
pH Value 4.0~9.0
Appearance Colorless Clear Liquid

Standard Packaging

25kgs, 250kgs/plastic drum, 1250kg/IBC

Packaging photos coming soon

Risks and Safety Information

Not regulated by UN as hazardous substance
For more information, please refer to MSDS.

Not hazard

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