Sodium benzoate E211

Chemical formula: NaC6H5CO2

Sodium benzoate (sodium salt of benzoic acid, sodium benzoate) is a white powder that is odorless or has a slightly noticeable odor of benzaldehyde.

Due to its antibacterial properties, sodium benzoate has found application in the cosmetics industry in the production of cosmetics and hygiene products, such as shampoos, gels, and toothpastes.

Soluble in water (62.7 g per 100 g of water at 0°C, 74.2 g at 100°C), practically insoluble in alcohol (2.3 g per 100 g at 23°C). The aqueous solution is transparent and colorless. Stable when boiled. Works fully in an acidic environment (pH not higher than 5, preferably pH 3.8-4.5). The combination of sodium benzoate (0.05-0.08 and potassium sorbate (0.05-0.13) gives a synergistic effect and inhibits lactic acid bacteria more strongly than each component separately.

Method of application: dissolve sodium benzoate in a small amount of water (1:1) and add to the finished emulsion or to the aqueous phase during the preparation of the cream. Dosage: up to 0.5% (0.15 g per 30 g of cream)

WARNING
Sodium benzoate should not be used in products with ascorbic acid to avoid the formation of benzene (a carcinogen). In case of hypersensitivity of the skin, urticaria, asthma, sodium benzoate can provoke an exacerbation, an allergic reaction, skin irritation. Avoid contact with the respiratory system and eyes.