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Sodium Benzoate


Sodium benzoate is a preservative. It is bacteriostatic and fungistatic under acidic conditions.


Sodium benzoate is a broad-spectrum antimicrobial agent, but its antimicrobial effectiveness is dependent on the pH of the food. As the acidity of the medium increases, its bactericidal and bacteriostatic effects are enhanced, but in alkaline medium, the bactericidal and bacteriostatic effects are lost. The optimum pH value of its anticorrosion is 2.5~4.0.

Item Standard Result
Characteristics White Powder White Powder
Identifications Qualfied Qualfied
Acidity or alkalinity 0.2 <0.20
Assay 99.0%~100.5% 99.50%
Heavy metals(Pb) 0.00% <0.001%
Ionic chloride 0.02% <0.02
Total chlocine 0.03% <0.03
Loss on drying 2.00% 1.13%
Clarity and colour of solution Qualified Qualified
Conclusion: The product above complies with the BP-98.

Functions and Applications

Sodium benzoate is generally used in carbonated drinks, soy sauce, sauces, preserves and fruit and vegetable drinks.
It can be used together with para-hydroxybenzoic acid esters in soy sauce and beverages for synergy.
Sodium benzoate is often used to preserve highly acidic fruits, jams, beverage syrups and other acidic foods. It can be used in combination with low-temperature sterilization and has a synergistic effect.

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