Benzoic acid is an aromatic acid organic compound and the simplest aromatic acid. The melting point is 122.13 ℃, the boiling point is 249.2 ℃, and the relative density (15/4 ℃) is 1.2659. Appearance is white needle-like or scaly crystals. Sublimation occurs when the temperature is above 100 °C. Slightly soluble in cold water, hexane, soluble in hot water, ethanol, ether, chloroform, benzene, carbon disulfide and turpentine, etc. Benzoic acid exists widely in nature in the form of free acid, ester or its derivatives. It is mainly used for the preparation of sodium benzoate as a preservative, and for the synthesis of drugs and dyes; it is also used for the preparation of plasticizers, mordants, fungicides and spices.
Preservative: Benzoic acid have the effect of accompanying growth, and have no toxic smell, and they are almost non-extensive around them. In weak environmental media, benzoic acid at a concentration of 0.1% can inhibit growth. Growth pH has a great influence on the foaming value and antibacterial effect of benzoate alone, and its effect is obvious in the degrading performance. The best effect is reduced when the pH value is between 2.5 and 4.5.
Fixing agent：Benzoic acid can be used as a fixative for fruit juice drinks
Industrial applications：Industrial use, as an intermediate
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