What are the similar properties of benzoic acid and sodium benzoate:
Benzoic acid is also called benzoic acid, so sodium benzoate is also called sodium benzoate. Benzoic acid is insoluble in water at room temperature, slightly volatile in air (especially hot air), hygroscopic, about 0.34g/100ml at room temperature; but soluble in hot water; also soluble in ethanol, chloroform and non-volatile Oil.
Sodium benzoate is mostly white granules, odorless or with a slight benzoin odor, slightly sweet in taste, and astringent; easily soluble in water (room temperature) at about 53.0g/100ml, with a pH of about 8; sodium benzoate is also an acid agent, in alkaline There is no effect in the medium; its optimum pH is 2.5-4.0, and the effect of 5% solution is not very good at pH5.0. Sodium benzoate has a high lipophilicity, easily penetrates the cell membrane and enters the cell body, interferes with the permeability of the cell membrane and the absorption of amino acids by the cell membrane; enters the cell body, ionizes and acidifies the alkali storage in the cell, and activates the respiratory enzyme system of the cell, preventing acetyl Coenzyme A condensation reaction, so as to serve the purpose of food.
Sodium benzoate is mostly used in use; the properties and properties of benzoic acid and sodium benzoate are similar.