单词	benzoic acid
释义	benzoic acid /bɛnˈzəʊɪk / noun [mass noun] Chemistry A white crystalline substance present in benzoin and other plant resins, used as a food preservative. Chemical formula: C6H5COOH. Compounds that protect against sun damage include such things as titanium dioxide, para amino benzoic acid, and benzyl cinnamate.... In a second method, toluene is mixed with nitric acid and oxidized to produce benzoic acid. The most commonly found preservatives in the food samples were benzoic acid and sorbic acid.
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