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Benzoic acid

CAS#65-85-0

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.
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Introduction

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

Functions and Applications

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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