658510
Potassium sulfite
90%
Synonym(s):
dipotassiumsulfite
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About This Item
Linear Formula:
K2SO3
CAS Number:
Molecular Weight:
158.26
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
233-321-1
MDL number:
Assay:
90%
Form:
powder
Solubility:
water: soluble (1,060 g/l at 25 °C (77 °F))
Quality Level
assay
90%
form
powder
solubility
water: soluble (1,060 g/l at 25 °C (77 °F))
SMILES string
[K+].[K+].[O-]S([O-])=O
InChI
1S/2K.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
InChI key
BHZRJJOHZFYXTO-UHFFFAOYSA-L
Application
Potassium sulfite (K2SO3) can be used as a catalyst in the oxidation of sulfur dioxide. It is also used as an anionic catalyst for the cyclotrimerization of aryl isocyanates to prepare heterocyclic symmetrical isocyanurates.
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Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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The reactivity of products of thermal interaction between ammonium meta-vanadate and potassium sulfite as catalysts for oxidation of sulfur dioxide
Fouda MFR, et al.
Applied Catalysis A: General, 223(1-2), 11-27 (2002)
Sulfate catalysed multicomponent cyclisation reaction of aryl isocyanates under green conditions
Dekamin, Mohammad G, et al.
J. Chem. Res. (M), 2005(3), 177-179 (2005)
David Crich et al.
Journal of the American Chemical Society, 128(8), 2544-2545 (2006-02-24)
Alkylation of potassium selenosulfate with allylic halides gives Se-allyl seleno Bunte salts. On reaction with thiols at room temperature, these afford mixed dialkyl selenosulfides, which undergo 2,3-sigmatropic rearrangement with loss of selenium, either spontaneously or with assistance by triphenylphosphine, thereby