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  • Sodium metabisulfite (chemical formula Na2S2O5) is a versatile and widely utilized compound in various industries due to its strong reducing properties. This white crystalline powder is highly soluble in water and has a slightly sulfurous odor. Sodium metabisulfite is a bisulfite salt, derived from sulfurous acid, and it plays a crucial role in food preservation, water treatment, and the pharmaceutical industry.


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  • Common acids used in food to enhance flavor and preserve flavors include citric acid, malic acid, acetic acid, phosphoric acid, ascorbic acid, lactic acid, sodium lactate and trisodium citrate. All are naturally occurring but typically are chemically synthesized for use in food.

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