Benzoic acid has the effect of sterilizing and inhibiting the growth of bacteria, and is low-toxic and tasteless, so it is widely used as a preservative.
Benzoic acid has the effect of sterilizing and inhibiting the growth of bacteria, and is low-toxic and tasteless, so it is widely used as a preservative.
Benzoic acid used as preservatives in food and drinks to prevent the growth of mold, yeast and fungi. In general the salts are preferred over the acid form because they are more soluble in water. The optimal pH for the antimicrobial activity is below pH 6.5 and sorbates are generally used at concentrations of 0.025% to 0.10%. Adding sorbate salts to food will however raise the pH of the food slightly so the pH may need to be adjusted to assure safety.
| Item | Specification | Test result |
| Appearance | Colorless crystals or white crystalline powder | Conforms |
| Content | 99%min | 99.58% |
| Melting Point | 121-124℃ | 123.0℃ |
| Sulfate Ash | 0.1%Max | 0.08% |
| Loss on drying | 0.5%Max | 0.16% |
| Carbonizable substance | Y5 | Y5 |
| Heavy metals | 10ppm max | 7ppm |
| Chloride | 200ppm max | 150ppm max |
| Residue on ignition | 0.1%max | 0.07%max |
In the food industry, benzoic acid and sodium benzoate can be used as preservatives for soy sauce, pickles, apple cider, fruit juice, feed, etc. In drugs, cosmetics, toothpaste, fragrant powder, tobacco leaves, etc., benzoic acid and sodium benzoate are also used as preservatives.
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