≥97% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature,Argon charged Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 14 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
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.
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.
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Inorganic compounds |
|---|---|
| Superclass | Mixed metal/non-metal compounds |
| Class | Alkali metal oxoanionic compounds |
| Subclass | Alkali metal dithionites |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Alkali metal dithionites |
| Alternative Parents | Inorganic salts Inorganic oxides |
| Molecular Framework | Not available |
| Substituents | Alkali metal dithionite - Inorganic oxide - Inorganic salt |
| Description | This compound belongs to the class of inorganic compounds known as alkali metal dithionites. These are inorganic compounds in which the largest oxoanion is dithionite, and in which the heaviest atom not in an oxoanion is an alkali metal. |
| External Descriptors | Not available |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
 K2225794 | Certificate of Analysis | Sep 04, 2026 | P401412 |
| K2225808 | Certificate of Analysis | Sep 04, 2026 | P401412 |
| H2507064 | Certificate of Analysis | Aug 13, 2025 | P401412 |
| H2507063 | Certificate of Analysis | Aug 11, 2025 | P401412 |
| H2507067 | Certificate of Analysis | Aug 10, 2025 | P401412 |
| A2507089 | Certificate of Analysis | Sep 12, 2022 | P401412 |
| D2528018 | Certificate of Analysis | Sep 12, 2022 | P401412 |
| F2412076 | Certificate of Analysis | Sep 12, 2022 | P401412 |
| Solubility | Soluble in water. Insoluble in ethanol. |
|---|---|
| Sensitivity | Air & Moisture Sensitive |
| Melt Point(°C) | 190°C |
| Molecular Weight | 222.330 g/mol |
| XLogP3 | |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 6 |
| Rotatable Bond Count | 0 |
| Exact Mass | 221.846 Da |
| Monoisotopic Mass | 221.846 Da |
| Topological Polar Surface Area | 125.000 Ų |
| Heavy Atom Count | 9 |
| Formal Charge | 0 |
| Complexity | 136.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 3 |
