Potassium Bisulphite, Extra Pure (Potassium Metabisulphite)

Metabisulphite (K₂S₂O₅), is a very strong substance, which is used extensively as an antioxidant, preservative, and sterilizing agent in many scientific and industrial applications. These sulphur compounds are strong reducing agents and are utilized extensively in food processing, beverages, chemical laboratories, and even in microbiological applications.

Potassium Metabisulphite is utilized in the preparation of selective media in microbiology for inhibiting the growth of undesirable organisms, particularly in mould and yeast cultures. Its function as an antimicrobial compound makes it suitable for the inhibition of bacterial impurities in fermentation research. As a reductant in titration and redox titration with the added advantage of easy control during chemical analysis, the reagent is applied in analytical chemistry.

In winemaking and brewing, especially in food and beverage processing, Potassium Metabisulphite is a preservative that releases sulphur dioxide (SO₂) that inhibits the growth of wild yeasts and oxidation spoilage. It stabilizes wine and juice colours and prevents them from being spoiled by microorganisms. In fruit processing, it is used to prevent browning as well as increase shelf life by inhibiting oxidative reactions.

In the lab, the material is valued because of its purity and reliability as a constant reactant. It is widely utilized in sample preparation, purification procedures, and sanitizing equipment procedures. The second pure grade offers negligible interference from trace amounts of impurities, an extremely important factor in analytically sensitive experiments and high-precision tests.

Potassium Bisulphite/Metabisulphite is typically a white crystalline powder of high water solubility. Sulphurous acid is emitted when in solution, and for this reason, it is also used as a preservative and has antimicrobial properties. It needs controlled storage and cold, dry conditions to be stable and effective, since exposure to water or air will cause decomposition.

With all the applications—ranging from inhibiting microbes and antioxidants to chemical and food safety analysis—Potassium Bisulphite is still an essential reagent in applied and research contexts.