Sodium benzoate has the chemical formula NaC 7 H 5 O 2; it is a widely used food preservative, with an E number of 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.s a food additive, sodium benzoate has the E number E211. It is bacteriostatic and fungistatic under acidic conditions.
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Rob McElhenney Mac. Rob McElhenney is the creator of Itâs Always Sunny in Philadelphia, the critically acclaimed FXX series in which he also co-stars. He also serves as writer and executive producer. McElhenney has also been featured on Lost on ABC.