Sodium benzoate has the chemical formula NaC6H5CO2; 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. It can be produced by reacting sodium hydroxide with benzoic acid.
Read more about Sodium Benzoate: Uses, Mechanism of Food Preservation, Production, Safety and Health, Compendial Status
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—H.L. (Henry Lewis)