Product show

Diammonium Phosphite


Synonyms: Diammonium Phosphite Monohydrate; (NH4)2HPO3; (NH4)2HPO3.H2O; Phosphonic Acid Diammonium Salt; Diammonium Hydrogen Phosphite Monohydrate; Ammonium Phosphite Dibasic Monohydrate
CAS No.:51503-61-8
EC No.:
Molecular Formula: (NH4)2HPO3.H2O
Molecular Weight: 120.08
M.p.: °C
B.p.: °C:
Solubility: Soluble in water


Disodium phosphite is made by reaction between ammonia and phosphorous acid:

2(NH3.H2O) + H3PO3= (NH4)2HPO3.H2O + H2O


Diammonium phosphite monohydrate is mainly used as a high-efficient fertilizer with fungicide effects.


Appearance white crystals
Content 98.0% min.
Chlorides 0.01% max.
Iron 10 ppm max.
Heavy Metals as Pb 2 ppm max.

Standard Packaging

50lbs, 20kgs/bag

Risks and Safety Information

Diammonium Phosphite Monohydrate is NOT regulated by UN as hazardous goods.

Keep bags tightly closed in dry and cool place, avoid direct sun-light.

Avoid contact with skin and eyes.

Avoid breathing dust.

Keep clear from drains.

No hazard

Related Products