Monopotassium phosphite

Monopotassium phosphite
Names
	IUPAC name Potassium hydrogen phosphonate
	Other names Potassium dihydrogen phosphite; Mono potassium phosphite; Monopotassium dihydrogen phosphite; Potassium phosphite monobasic
Identifiers
CAS Number	13977-65-6 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.116.175
PubChem CID	23701737;
	InChI InChI=1S/K.H2O3P/c;1-4(2)3/h;1-2H/q+1;-1 Key: BZHCGFBZBPVRFE-UHFFFAOYSA-N;
	SMILES OP(O)[O-].[K+];
Properties
Chemical formula	H2KO3P
Molar mass	120.09 g·mol−1
Appearance	white crystals
Density	2.14 g/cm3
Solubility in water	2200 g/L
Solubility	soluble in ethanol
Structure
Crystal structure	monoclinic
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Monopotassium phosphite is an inorganic compound with the formula KH₂PO₃. A compositionally related compound has the formula H₃PO₃^.2(KH₂PO₃). Both are white solids that contain salts of the phosphite anion H₂PO₃⁻, the conjugate base of phosphorous acid. These materials have been used in some fertilizers.^[1]

References

↑ "Crystal chemistry of inorganic phosphites", J. Loub, Acta Crystallogr. (1991), B47, 468–473, doi:10.1107/S0108768191002380

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[Loub-1] "Crystal chemistry of inorganic phosphites", J. Loub, Acta Crystallogr. (1991), B47, 468–473, doi:10.1107/S0108768191002380