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SULPHITES > Sodium Benzoate

Sodium benzoate has the chemical formula NaC7H5O2; it is a widely used food preservative, with E number E211. It is the sodium salt of benzoic acid and exists in this form when dissolved in water.

Melting point: 300 °C, Molar mass: 144.11 g/mol, Density: 1.50 g/cm³

Uses :


Sodium benzoate is a preservative. As a food additive, sodium benzoate has the E number E211. It is bacteriostatic and fungistatic under acidic conditions. It is most widely used in acidic foods such as salad dressings (vinegar), carbonated drinks (carbonic acid), jams and fruit juices (citric acid), pickles (vinegar), and condiments. It is also used as a preservative in medicines and cosmetics.[2][3] Concentration as a preservative is limited by the FDA in the U.S. to 0.1% by weight.[4] Sodium benzoate is also allowed as an animal food additive at up to 0.1%, according to AFCO's official publication.

Pharmaceutical applications

Sodium benzoate is used as a treatment for urea cycle disorders. Recent research shows that sodium benzoate may be beneficial as an add-on therapy (1 gram/day) in schizophrenia.[8][citation needed] Total Positive and Negative Syndrome Scale scores dropped by 21% compared to placebo.

Other uses

Sodium benzoate is also used in fireworks as a fuel in whistle mix, a powder that emits a whistling noise when compressed into a tube and ignited. The fuel is also one of the fastest burning rocket fuels and provides a lot of thrust and smoke. It does have its downsides: there is a high danger of explosion when the fuel is sharply compressed because of the fuel's sensitivity to impact.