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.

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.