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P2522

Sigma-Aldrich

Kaliumdisulfid

≥98%

Synonym(e):

Kaliummetabisulfit, Kaliumpyrosulfit

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500 G
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About This Item

Lineare Formel:
K2S2O5
CAS-Nummer:
16731-55-8
Molekulargewicht:
222.32
EG-Nummer:
240-795-3
MDL-Nummer:
MFCD00167605
UNSPSC-Code:
12352302
PubChem Substanz-ID:
329820140
NACRES:
NA.55

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Qualitätsniveau

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

InChIKey

RWPGFSMJFRPDDP-UHFFFAOYSA-L

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Allgemeine Beschreibung

Potassium disulfite (Potassium metabisulfite, PMB) is an inorganic salt with antimicrobial properties.[1] It is a sulfiting agent that prevents browning of foods.[2] Its genotoxic and cytotoxic effect has been assessed.[1] PMB undergoes hydrolysis to form potassium bisulfite.[3]

Anwendung

Potassium disulfite has been used in a protocol for the modification of the polydimethylsiloxane (PDMS) polymer surfaces.[4]
It may be used in the following processes:
  • Chemical etching of poly(vinylidene fluoride) in β-phase (β-PVDF) irradiated films.[5]
  • Decolorization during the synthesis of 2-iodopyrimidine derivatives.[6]
  • Palladium-catalyzed aminosulfonylation of aryl halides.[7]

Piktogramme

Corrosion
GHS05

Signalwort

Danger

H-Sätze

H318

Gefahreneinstufungen

Eye Dam. 1

Zusätzliche Gefahrenhinweise

EUH031

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 1

Hier finden Sie alle aktuellen Versionen:

Analysenzertifikate (COA)

Lot/Batch Number
0000440427
0000440427
0000410561
0000400312
0000348233

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Die Dokumentenbibliothek aufrufen

A palladium-catalyzed reaction of aryl halides, potassium metabisulfite, and hydrazines.
Ye S and Wu J.
Chemical Communications (Cambridge, England), 48(80), 10037-10039 (2012)
Biofunctionalization and self-interaction chromatography in PDMS microchannels.
Deshpande KS, et al.
Biochemical Engineering Journal, 67, 111-119 (2012)
Nanoporous β-PVDF membranes with selectively functionalized pores.
Cuscito O, et al.
Nucl. Instrum. Methods Phys. Res. Sect. B, 265(1), 309-313 (2007)
Amperometric quantification of sodium metabisulfite in pharmaceutical formulations utilizing tetraruthenated porphyrin film modified electrodes and batch injection analysis.
Quintino MSM, et al.
Talanta, 68(4), 1281-1286 (2006)
Gábor Vlád et al.
The Journal of organic chemistry, 67(18), 6550-6552 (2002-08-31)
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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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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