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Monopotassium phosphite

From Wikipedia, the free encyclopedia

Monopotassium phosphite
Ball-and-stick model of the component ions
Ball-and-stick model of the component ions
Names
IUPAC name
Potassium hydrogen phosphonate
Other names
Potassium dihydrogen phosphite; Mono potassium phosphite; Monopotassium dihydrogen phosphite; Potassium phosphite monobasic
Identifiers
3D model (JSmol)
ECHA InfoCard 100.116.175 Edit this at Wikidata
UNII
  • InChI=1S/K.H2O3P/c;1-4(2)3/h;1-2H/q+1;-1
    Key: BZHCGFBZBPVRFE-UHFFFAOYSA-N
  • OP(O)[O-].[K+]
Properties
H2KO3P
Molar mass 120.085 g·mol−1
Appearance white crystals
Density 2.14 g/cm3
2200 g/L
Solubility soluble in ethanol
Structure
monoclinic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

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 consist of salts of the phosphite anion H2PO3−, the conjugate base of phosphorous acid.[1]

Phosphites of potassium are used as fungicides (in a loose sense) in agriculture to combat water mold infection. Confusingly, they have also been marketed as fertilizers to avoid a regulatory burden. While perfectly capable to supply potassium to the plant, the phosphorus in phosphite form is unavailable to plants, and may even inhibit the uptake of the normal phosphate form if used in excess.[2]

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Transcription

References

  1. ^ J. Loub (1991). "Crystal Chemistry of Inorganic Phosphites". Acta Crystallogr. B47: 468–473. doi:10.1107/S0108768191002380.
  2. ^ Thao; Yamakawa (2008). "Phosphite (phosphorous acid): Fungicide, fertilizer or bio-stimulator?". Soil Science and Plant Nutrition. 55 (2): 228–234. doi:10.1111/j.1747-0765.2009.00365.x. S2CID 95723306.


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This page was last edited on 11 February 2024, at 14:11
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