Sodium Benzoate

Sodium Benzoate – A Widely Used and Safe Preservative in Food and Cosmetics

1. Introduction

Sodium Benzoate is the sodium salt of benzoic acid, commonly used as an antimicrobial preservative in the food, cosmetic, and pharmaceutical industries. It effectively inhibits the growth of mold, yeast, and bacteria, helping extend the shelf life of products safely and efficiently.

 

2. Common Applications

2.1 In food:

• Used to preserve carbonated drinks, fruit juices, sauces, jams, pickles, canned goods, and more

• Maintains freshness and natural taste without altering flavor

2.2 In cosmetics:

• Prevents microbial growth in creams, facial cleansers, shampoos, facial mists, and similar products

• Suitable for natural skincare and products for sensitive skin

2.3 In pharmaceuticals:

• Used to preserve oral syrups, eye drops, and topical medications

3. Key Benefits of Sodium Benzoate

• Recognized as safe by FDA and WHO when used within permitted levels

• Water-soluble, odorless, colorless

• Highly effective in acidic environments (pH < 4.5)

• Often combined with Potassium Sorbate for enhanced preservation

• 

4. How to Use (for DIY cosmetics)

• Recommended usage rate: 0.1% – 0.5%

• Dissolve in warm water (40–70°C) before mixing into your formula

• Add during the water phase of formulation

5. Conclusion

Sodium Benzoate is a versatile and widely accepted preservative used in food, cosmetics, and pharmaceuticals. When used at proper concentrations, it offers a safe and effective solution for extending product shelf life, especially in acidic formulations.