Sodium benzoate acid preservatives, is commonly used in acidic condition, under acid condition can be converted into the activity of benzoic acid, so the corrosion mechanism of benzoic acid. Its antiseptic function best when pH 2.5 4.0. In alkaline medium, no sterilization and bacteriostasis. Because of water-soluble than benzoic acid, sodium benzoate in water interface system is more easily dissolved and dispersed, and stability in the air, so much more common than benzoic acid. Sodium benzoate lipophilicity is bigger, is easy to penetrate the cell membrane into the cells, interfere with the cell membrane permeability, inhibition of cell membrane to the absorption of amino acids; Into cells ionization acidification of alkali store inside the cell, and inhibit cell in the department of respiratory enzyme activity, prevent acetyl-coa condensation reaction, thereby the purpose of food antiseptic.
Sodium benzoate is a common food preservative, have prevent metamorphism, I extend the shelf life of effect. In beverages, canned, fruit juice, soy sauce, vinegar, and other areas of the food, cold food has a broad application and also can be used as a beverage preservatives. Sodium benzoate low toxicity. Toxicity and concerns in recent years has limited its application, the limits to its use.
Within the scope of the safety use of sodium benzoate has no effect on the body is, the excessive use of sodium benzoate can cause cancer, birth defects and death. Sodium benzoate belongs to low toxic substances, the time of poisoning symptoms and lavage dose there is a direct linear relationship, the greater the dose the higher mortality. Sodium benzoate this chemical, also good for people. We should try to reduce the consumption of contain preservative sodium benzoate do matter, usury risk-averse, correct treatment of sodium benzoate.