What is Potassium Meta Bi Sulphite?
Potassium Metabisulphite (K2S2O5) is an inorganic salt widely used as an antimicrobial preservative, antioxidant, and bleaching agent in the food and beverage industry. It is a white crystalline powder that releases sulphur dioxide (SO2) gas when dissolved in water or exposed to acidic conditions, and this released SO2 is responsible for its preservative and antimicrobial action against yeasts, moulds, and certain bacteria.
Polychem Industries supplies Potassium Metabisulphite in food grade to winemakers, fruit and vegetable processors, beverage manufacturers, and dried fruit producers across India and internationally. Its effectiveness as an antimicrobial agent and antioxidant, combined with its ability to inhibit unwanted fermentation and browning, make it indispensable in winemaking and various food preservation applications.
Sulphite Sensitivity Notice
Potassium Metabisulphite releases sulphur dioxide, to which some individuals are sensitive or allergic, particularly those with asthma. Products containing sulphites above regulatory thresholds must be labelled accordingly. Handle in well-ventilated areas and avoid inhalation of dust or fumes.
Available Grades
| Grade | Form | Purity | Standard | Applications |
|---|---|---|---|---|
| Food Grade | White crystalline powder | ≥98% (Food Grade) | FSSAI / FCC / E224 | Wine making, fruit preservation, dried fruits, beverages |
Applications & Uses
Wine Making
One of the most important applications. Potassium Metabisulphite is used extensively in winemaking to inhibit unwanted wild yeast and bacterial growth, prevent oxidation, and control the fermentation process, helping ensure consistent wine quality and stability.
Fruit & Vegetable Preservation
Used to prevent enzymatic browning in cut fruits and vegetables, and as a preservative in fruit juices, purees, and concentrates, helping maintain colour and extend shelf life during processing and storage.
Dried Fruits
Widely used to preserve the colour and prevent microbial spoilage of dried fruits such as apricots, raisins, and other dehydrated fruit products, maintaining an appealing appearance throughout extended storage.
Beverage Preservation
Used as a preservative in fruit-based beverages, cordials, and certain soft drinks to inhibit microbial growth and extend shelf life, particularly in products without other preservation methods such as pasteurisation.
Industrial & Photographic Applications
Industrial Grade Potassium Metabisulphite is used in certain photographic processing solutions and various industrial applications requiring a reducing agent or antioxidant function.
Mushroom Processing
Used in the processing and preservation of mushrooms to prevent enzymatic browning and microbial spoilage, helping maintain product appearance and extend shelf life during distribution.
Technical Specifications
Potassium Meta Bi Sulphite — Key Properties
Why Source Potassium Meta Bi Sulphite from Polychem Industries?
- Food Grade (E224) compliant with FSSAI for all food applications
- Certificate of Analysis available on request
- Effective antimicrobial and antioxidant action for wine and food preservation
- Reliable bulk supply for winemakers and food processors
- Competitive pricing with consistent year-round availability
- Export documentation experience for international shipments
