Benzoic Acid : Uses, Structure, Properties

Benzoic Acid.

It is simplest aromatic carboxylic acid.
Benzoic Acid Preparation.
Benzoic acid is prepared:
(1) By oxidation of alkylbenzenes alongside acidic potassium permanganate or sodium dichromate.

(2) By reaction of phenylmagnesium bromide alongside carbon dioxide followed past times acid-hydrolysis of the add-on product.

(3) By acid-hydrolysis of phenyl cyanide (benzonitrile).

(4) By basic-hydrolysis of benzotrichloride. Benzotrichloride is obtained past times chlorination of toluene.

Physical Properties of Benzoic Acid.

Benzoic acid is colourless solid, mp 122ºC. It is soluble inwards hot water, diethyl ether, ethanol, as well as benzene. It is steam-volatile, Benzoic acid is a slightly stronger acid than acetic acid (k_a = 6.3x10^-5; 1.75x10^-5). The feature carbonyl IR stretching absorption for benzoic acid is establish at 1710-1720 cm^-1.

Chemical Properties of Benzoic Acid.

The reactions of benzoic acid are those of the carboxyl grouping as well as the benzene ring.

Benzoic Acid Uses.

Benzoic acid is used:

1. As germicide-in medicine for urinary infection as well as inwards vapour shape for disinfecting bronchial tubes.
2. As nutrient preservative-sodium benzoate is used for preserving pickles, tomato plant ketchup, as well as fruit juices.

Benzoic Acid Structure.

Benzoic acid is a organic chemical compound as well as chemic formula is C₇H₆O₂ or C₆H₅COOH.

Benzoic Acid Boiling Point.

Benzoic acid boiling squall for is 249.2 °C.