benzoic acid

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benzoic acid

(bĕnzō`ĭk), C6H5CO2H, crystalline solid organic acid that melts at 122°C; and boils at 249°C;. It is the simplest aromatic carboxylic acid (see aryl grouparyl group
, in chemistry, group of atoms derived from benzene or from a benzene derivative by removing one hydrogen that is bonded to the benzene ring (see radical). The simplest aryl group is phenyl, C6H5 ; it is derived from benzene.
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 and carboxyl groupcarboxyl group
, in chemistry, functional group that consists of a carbon atom joined to an oxygen atom by a double bond and to a hydroxyl group, OH, by a single bond. Carboxylic acids are compounds whose molecules contain a carboxyl group that is joined to a hydrogen atom, an
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). In addition to being synthesized from a variety of organic compounds (e.g., benzyl alcohol, benzaldehyde, toluene, and phthalic acid), it may be obtained from resins, notably gum benzoinbenzoin
or benzoinum
, balsamic resin, the dried exudation from the pierced bark of various species of the benzoin tree (Styrax) native to Sumatra, Java, and Thailand; appearing as red-brown to yellow-brown tears.
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. It is used largely for making its salts and esters, most notably sodium benzoate, which is widely used as a preservative in foods and beverages and as a mild antiseptic in mouthwashes and toothpastes.

Benzoic Acid

 

the simplest aromatic acid, C6H5COOH; it forms clear, lustrous crystals. It was first isolated by sublimation at the beginning of the 17th century from benzoic resin (benzoin gum), hence its name. Its melting point is 122° C. Benzoic acid is readily soluble in organic solvents; it is poorly soluble in water. It sublimates readily and is distilled with steam. Benzoic acid is obtained by the oxidation of toluene with nitric or chromic acid, as well as by the decarboxylation of phthalic acid.

Benzoic acid in the form of complex esters and salts is contained in various natural essential oils—for example, clove oil. In medicine it is used externally in cases of skin diseases as an antiseptic and fungicidal agent; its sodium salt is used as an expectorant. In addition, the sodium salt is used in the preservation of foodstuffs. The esters of benzoic acid (from methyl to amyl), which have a strong odor, are used in the perfume industry. Various derivatives of benzoic acid— for example, chlorobenzoic and nitrobenzoic acids—are used in the synthesis of dyes.

benzoic acid

[ben′zō·ik ′as·əd]
(organic chemistry)
C6H5COOH An aromatic carboxylic acid that melts at 122.4°C, boils at 250°C, and is slightly soluble in water and relatively soluble in alcohol and ether; derivatives are valuable in industry, commerce, and medicine.
References in periodicals archive ?
We have found that aqueous solubility of benzoic acid can be increased in the presence of surfactants of the poloxamer type.
Effect of Benzoic acid (B) on performance of turkey poults, pH values in the digestive tract and intestinal microbiota in trial (1) Item Dietary treatment C (1) B300 Body weight gain (g) 1 to 28 961 [+ or -] 44 (b) 1,095 [+ or -] 66 (a) 1 to 56 3,170 [+ or -] 150 (b) 3,330 [+ or -] 124 (a) FCR (kg/kg) 1 to 28 1.
The objective of this study was to evaluate the effect of benzoic acid and essential oil compounds on the performance of turkeys.
During the feeding period that lasted 56 days, one group (control) was fed on a basal diet while the second group was fed on the same diet supplemented with 300 mg/kg of a mixture of benzoic acid and essential oils (BMEO) compounds.
For the first trial and to investigate the effect of benzoic acid on turkeys' performance, data was statistically analysed by analysis of variance using the PROC MIXED procedure of SAS (1989) with replication in time considered as a random effect.
In this study a basal diet (Table 1) was supplemented with various feed additives (one of the following compounds: benzoic acid, thymol, a mixture of essential oil blends (MEO) and a combination of benzoic acid and MEO (BMEO group) in order to study their effect on growth performance and certain health related parameters of turkey poults.
In the first experiment, benzoic acid was added in the basal feed at the levels of 300 mg/kg and 1,000 mg/kg resulting in the B300 and B1,000 groups respectively.
Effect of combination of benzoic acid and MEO on growth performance
In trial 3, the combine effect of benzoic acid and MEO on growth performance of turkey poults was examined.