Preservatives

Benzoic acid CAS 65-85-0

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Benzoic acid CAS 65-85-0

Benzoic acid, also known as benzoic acid, has the molecular formula C6H5COOH. It is the simplest aromatic acid with a carboxyl group directly attached to the carbon atom of the benzene ring. It is a compound formed by replacing a hydrogen on the benzene ring with a carboxyl group (- COOH). It is a colorless, odorless flake crystal. Melting point 122.13 ℃, boiling point 249 ℃, relative density 1.2659 (15/4 ℃). It rapidly sublimates at 100 ℃, and its vapor has strong irritants, which can easily cause coughing when inhaled. Slightly soluble in water, easily soluble in organic solvents such as ethanol, ether, chloroform, benzene, toluene, carbon disulfide, carbon tetrachloride, and turpentine. Widely present in nature in the form of free acids, esters, or their derivatives, for example, in benzoin gum in the form of free acids and benzyl esters; It exists in a free form in the leaves and stem bark of some plants; It exists in the form of methyl ester or benzyl ester in essence oil



















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Benzoic acid CAS 65-85-0


Benzoic acid is commonly used as a medicine or preservative, which has the effect of inhibiting the growth of fungi, bacteria, and molds. When used in medicine, it is usually applied to the skin to treat skin diseases such as ringworm. Used in the synthetic fiber, resin, coating, rubber, and tobacco industries. Initially, benzoic acid was produced by dry distillation of benzoin gum or hydrolysis of alkaline water, or by hydrolysis of hippuric acid. In industry, benzoic acid is produced by air oxidation of toluene in the presence of catalysts such as cobalt and manganese; Or it can be obtained by hydrolysis and decarboxylation of phthalic anhydride. Benzoic acid and its sodium salts can be used as antibacterial agents for latex, toothpaste, jam, or other foods, as well as as as mordants for dyeing and printing.




















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