UNDERSTANDING SODIUM BENZOATE USE IN BEVERAGE PRESERVATION
Sodium Benzoate
is on of the most commonly used preservative in the food and beverage industry, valued for its effectiveness against bacteria, yeasts, and moulds. Its use, however, must be carefully controlled to ensure both safety and optimal product performance.
Recommended Dosage and Legal Limits
Typical usage levels of sodium benzoate range between 0.05 % and 0.10 % (500 - 1,000 mg per liter). According to South African legislation, the maximum permitted level in non-alcoholic beverages is 1 G per L. Exceeding this level may result in regulatory non-compliance and can also negatively affect product taste.
Effectiveness and pH Consideration
Sodium benzoate is most effective in acidic environments, where the product pH is below 4.0 - ideally between 3.3 and 3.8. At pH levels above 4.5, the preservative becomes almost inactive, as it requires an acidic medium to convert to benzoic acid, the form that provides antimicrobial activity.
Sensory and Safety Considerations
When added at high concentrations (above 0.10 %), sodium benzoate may impart a slightly bitter or metallic taste to the finished beverage.
It is also important to note that when combined with ascorbic acid (vitamin C) and exposed to strong light or heat, small traces of benzene - a potential carcinogen - can form. To minimize this risk, beverages containing both ingredients should be protected from direct sunlight or bright UV exposure during storage and distribution.
Combination with Potassium Sorbate
For broader-spectrum preservation, sodium benzoate can be used together with potassium sorbate. This combination provides enhanced protection:
* Sodium benzoate: More effective against bacteria, and to some extent, yeasts and moulds.
* Potassium sorbate: Particularly effective against yeast and moulds.
When used together, the pH must still be maintained below 4.0 to ensure both preservatives perform effectively.
Typical combined dosages:
* Sodium benzoate: 0.05 - 0.10 %
* Potassium sorbate: 0.025 - 0.075 %
This synergistic approach can serve as an effective alternative for beverage manufacturers who wish to avoid preservatives such as natamycin, while still maintaining microbial stability and product safety.
For pricing and orders:
For technical assistance
Attached:
* Specification: Sodium Benzoate
* TDS: Potassium Sorbate Powder
* Campaign: Sodium Benzoate
* Campaign: Potassium Sorbate
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