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Sodium benzoate (E211), also called benzoate of soda, has chemical formula
65. It is the sodium salt of benzoic acid and exists in this form when
dissolved in water. It can be produced by reacting sodium hydroxide with
benzoic acid.
Uses Sodium benzoate is used as a preservative. It is not bactericidal,
only bacteriostatic. It has fungistatic activity. It is effective only in
acidic conditions (pH< 3.6) making its use most prevalent in foods such as
preserves, salad dressings (vinegar), carbonated drinks (carbonic acid),
jams (citric acid), fruit juices (citric acid), pickles (vinegar), and
Chinese food sauces (soy, mustard, and duck). It is also found in
alcohol-based mouthwash and silver polish. Sodium benzoate is used in many
soft drinks and can be identified on the label of the bottle or can as
'sodium benzoate' or E211. The taste of sodium b
