All Photos(2)
Synonym(s):
Potassium metabisulfite, Potassium pyrosulfite
Linear Formula:
K2S2O5
CAS Number:
Molecular Weight:
222.32
EC Number:
MDL number:
UNSPSC Code:
12352300
PubChem Substance ID:
NACRES:
NA.55
Quality Level
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
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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:
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.
signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 1
supp_hazards
wgk_germany
WGK 1
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A high-yield synthesis was developed for the preparation of 2,2'-bipyrimidine (1) using the Ullmann coupling of 2-iodopyrimidine. The new procedure was also used for the preparation of 4,4',6,6'-tetramethyl-2,2'-bipyrimidine (2) and 5,5'-dibromo-2,2'-bipyrimidine (3).
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