Sodium Metabisulphite

It is used as a preservative and antioxidant in food and is also known as E223. It can be used to preserve color of some fruits, such as bananas.

Sodium Metabisulphite occurs as colorless crystals or as a white to yellow, crystalline powder. It is freely soluble in water and slightly soluble in alcohol. Its solutions are acid to litmus.

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