Benzoic acid is a colorless, odorless crystalline flakes. Melting point is122.13 ℃, boiling point is249 ℃, relative density is 1.2659 (15 /4 ℃). it is in rapid sublimation at100 ℃. Benzoic acid has a strong irritating vapors, when you smell into lung,it can lead cough. It slightly soluble in water, soluble in alcohol, ether and other organic solvents. Benzoic acid is a weak acid, stronger than the fatty acids. But they have similar chemical properties, can form a salt, ester, acyl halides, amides, anhydrides, etc., are not susceptible to oxidation. Can occur on the benzene ring of benzoic acid electrophilic substitution reactions, mainly by the inter-substituted products.Benzoic acid and its sodium salt can be used into latex, toothpaste, jam or other food antimicrobial agent, it also can be used for dyeing and printing color mordant. It can also be used as a pharmaceutical and dye intermediates for the preparation of plasticizers and spices, but it is also a rust inhibitor of steel equipment.
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