Sodium metabisulphite (SMBS) is a chemical compound commonly used as a preservative and antioxidant in various industries.
## Properties and Uses
1. *Preservative*: SMBS is used to prevent the growth of bacteria, yeast, and mold in food, beverages, and pharmaceuticals.
2. *Antioxidant*: It helps prevent oxidation and spoilage in food products, particularly in fruits, vegetables, and seafood.
3. *Food applications*: SMBS is used in various food products, including wine, beer, fruit juices, and processed meats.
4. *Pharmaceutical applications*: It's used as a preservative in some pharmaceutical products, such as injectables and topical creams.
## Safety and Handling
1. *Toxicity*: SMBS can be toxic in high concentrations, and prolonged exposure can cause health issues.
2. *Handling precautions*: It should be handled with caution, using protective equipment and following proper safety protocols.
3. *Storage*: SMBS should be stored in a cool, dry place, away from heat sources and flammable materials.
## Regulatory Status
1. *Food additive*: SMBS is approved as a food additive by regulatory agencies, such as the US FDA and the European Food Safety Authority (EFSA).
2. *Pharmaceutical applications*: It's used in pharmaceutical applications, subject to regulatory approval and guidelines.
## Other Applications
1. *Water treatment*: SMBS is used in some water treatment applications to remove chlorine and other impurities.
2. *Pulp and paper industry*: It's used in the pulp and paper industry as a bleaching agent and preservative.
