Sodium Metabisulphite is a white crystalline powder commonly used as a preservative, antioxidant, and disinfectant across multiple industries. It serves as a food additive to prevent spoilage by inhibiting the growth of bacteria, molds, and yeasts.

In the food and beverage industry, it is frequently applied in winemaking, brewing, fruit preservation, and pickling to maintain freshness and extend shelf life. It is also used to sterilize equipment and prevent oxidation.

Beyond food, sodium metabisulphite finds applications in water treatment, photography, and textile processing due to its strong reducing properties.