Sodium benzoate is commonly used as a preservative in beverages.
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memory
Break it down: 苯 'benzene' + 甲酸 'methanoic/formic-type acid (carboxylic acid)' + 钠 'sodium'. 苯甲酸 on its own = benzoic acid, and the 钠 turns it into the sodium salt — sodium benzoate. E number E211 on European labels.