What is Sodium Metabisulfite Made From?
Sodium metabisulfite is a chemical compound with the formula Na2S2O5. It is made from the following substances:
- Sodium carbonate (soda ash)
- Sulfur dioxide (SO2) gas
The manufacturing process generally involves passing sulfur dioxide gas through a solution of sodium carbonate, resulting in the formation of sodium bisulfite. The solution is then evaporated, and the resulting crystals are heated to form sodium metabisulfite.
Sodium metabisulfite is commonly used as a disinfectant, antioxidant, and preservative agent.
