Potassium disulfite

Name: Potassium disulfite
Brand: SIGALD

≥98%

Synonym(s):

Potassium pyrosulfite, Potassium metabisulfite

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About This Item

Linear Formula:

K₂S₂O₅

CAS Number:

16731-55-8

Molecular Weight:

222.32

NACRES:

NA.55

PubChem Substance ID:

329820140

UNSPSC Code:

12352302

EC Number:

240-795-3

MDL number:

MFCD00167605

Assay:

≥98%

Form:

powder

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Properties

Quality Level

200

assay

≥98%

form

powder

SMILES string

[K+].[K+].[O-]S(=O)S([O-])(=O)=O

InChI

1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2

InChI key

RWPGFSMJFRPDDP-UHFFFAOYSA-L

Description

General description

Potassium disulfite (Potassium metabisulfite, PMB) is an inorganic salt with antimicrobial properties. It is a sulfiting agent that prevents browning of foods. Its genotoxic and cytotoxic effect has been assessed. PMB undergoes hydrolysis to form potassium bisulfite.

Application

Potassium disulfite has been used in a protocol for the modification of the polydimethylsiloxane (PDMS) polymer surfaces.
It may be used in the following processes:

Chemical etching of poly(vinylidene fluoride) in β-phase (β-PVDF) irradiated films.
Decolorization during the synthesis of 2-iodopyrimidine derivatives.
Palladium-catalyzed aminosulfonylation of aryl halides.