Sodium Benzoate

Benzoate of soda: a white crystalline salt used as a food preservative and antiseptic.

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 The sodium salt of benzoic acid.


A white crystalline soluble compound used as an antibacterial and antifungal agent in preserving food (E211), as an antiseptic, and in making dyes and pharmaceuticals.  Also called benzoate of soda.


Sodium benzoate is a type of salt that may occur naturally in some foods but is more likely to be chemically produced and added as a preservative to foods. When used as a preservative, sodium benzoate is typically added to foods in small amounts only. If too much is added, food may take on a very bitter taste.

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One study found that sodium benzoate created free radicals in the body, destorying mitochondrial DNA, adding to the body's aging process.


When combined with vitamin C (ascorbic acid) or citric acid, it forms benzene, a known carcinogen.

  This is a common problem in soft drinks.


Animal studies have shown it to be toxic to the liver at moderate doses.

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