Sodium benzoate is the sodium salt of benzoic acid and is used as a preservative in suitable foods and beverages. This article looks at its role in preservation and the importance of formulation pH.
What is sodium benzoate?
Sodium benzoate is generally supplied as a white crystalline powder or granules. It is soluble in water and is used in permitted applications according to the relevant food additive requirements.
Food preservation: limiting microbial growth
Sodium benzoate helps inhibit the growth of susceptible microorganisms, including yeasts and moulds. It is particularly effective in acidic products. Its performance depends on pH, concentration and the wider preservation system.
The importance of pH
Sodium benzoate is primarily a preservative, rather than a general-purpose pH regulator. Acidity strongly influences its effectiveness. Manufacturers must control pH using an appropriate formulation and validate the safety and shelf life of the finished product.
Beverage and fruit product applications
Sodium benzoate is used in certain beverages and fruit-based products where permitted. Its use level and suitability must be assessed for the specific product category, formulation and target market.
Sodium benzoate in food preservation
Sodium benzoate can support shelf life and product quality when used correctly. It forms part of a validated preservation strategy that also includes processing, hygiene and packaging. Compliance with permitted uses and limits remains essential.