benzaldehyde

benz·al·de·hyde

B0193700 (bĕn-zăl′də-hīd′)n. A colorless oily aromatic aldehyde, C₇H₆O, obtained naturally, as from the bitter almond, or made synthetically and used in perfumes and as a solvent and a flavoring.

benzaldehyde

(bɛnˈzældɪˌhaɪd) n (Elements & Compounds) a yellowish fragrant volatile oil occurring in almond kernels and used in the manufacture of dyes, perfumes, and flavourings and as a solvent for oils and resins. Formula: C6H5CHO. Systematic name: benzenecarbaldehyde

benz•al•de•hyde

(bɛnˈzæl dəˌhaɪd)

n. a colorless or yellowish water-soluble volatile oil, C₇H₆O, used in the synthesis of dyes, perfumes, and flavors and as a solvent. [1865–70; < German; see benz-, aldehyde]

Translations

benzaldeide

benzaldehyde

(bĕnzăl`dəhīd) or

benzenecarbonal

(bĕn'zēnkär`bənəl), C₆H₅CHO, colorless liquid aldehydealdehyde
[alcohol + New Lat. dehydrogenatus=dehydrogenated], any of a class of organic compounds that contain the carbonyl group, , and in which the carbonyl group is bonded to at least one hydrogen; the general formula for an aldehyde is RCHO, where R is hydrogen
..... Click the link for more information. with a characteristic almond odor. It boils at 180&degC;, is soluble in ethanol, but is insoluble in water. It is formed by partial oxidation of benzyl alcohol, and on oxidation forms benzoic acid. It is called oil of bitter almond, since it is formed when amygdalin, a glucoside present in the kernels of bitter almonds and in apricot pits, is hydrolyzed, e.g., by crushing the kernels or pits and boiling them in water; glucose and hydrogen cyanide (a poisonous gas) are also formed. It is also prepared by oxidation of toluene or benzyl chloride or by treating benzal chloride with an alkali, e.g., sodium hydroxide. Benzaldehyde is used in the preparation of certain aniline dyes and of other products, including perfumes and flavorings.

Benzaldehyde

an organic compound, C₆ H₅ CHO; a colorless, oily liquid with the odor of bitter almonds; T_m = –26° C; T_b = 179° C. Benzaldehyde dissolves in water in the proportions of 0.3 g : 100 g; it is miscible with alcohol, ether, and other organic solvents. Benzaldehyde is easily oxidized (even in air) into benzoic acid, C₆H₅COOH; however, the addition of 0.1 percent hydroquinone inhibits oxidation. Benzaldehyde combines with sodium bisulfite, hydrocyanic acid, and other molecules by a CO bond. When benzaldehyde is boiled with an alkaline solution, benzyl alcohol and benzoic acid are formed (the Cannizzaro reaction). In the presence of the CN ion, benzaldehyde enters into benzoin condensation. The condensation of benzaldehyde with acetaldehyde under the action of a base yields cinnemal-dehyde, C₆H₅CH=CHCHO; condensation with phenols and aromatic amines yields derivatives of triphenylmethane.

Benzaldehyde in the form of a glycoside of amygdalin, which breaks down in water to form benzaldehyde, glucose, and hydrocyanic acid, is contained in the pits of bitter almonds and apricots, peaches, and other fruits. Benzaldehyde is obtained by the oxidation of toluene or the hydrolysis of benzylidene chloride, C₆H₅CHCl₂. The method of obtaining benzaldehyde from benzene and carbon monoxide under the action of aluminum chloride is of great significance. Benzaldehyde is used as a fragrant substance, for the synthesis of cinnemaldehyde and benzoin, and in the production of dyes of the triphenylmethane series.

IA. F. KOMISSAROV

benzaldehyde

[benz′al·də‚hīd] (organic chemistry) C₆H₅CHO A colorless, liquid aldehyde, boiling at 170°C and possessing the odor of bitter almonds; used as a flavoring agent and an intermediate in chemical syntheses.

单词	benzaldehyde
释义	benzaldehyde benz·al·de·hyde B0193700 (bĕn-zăl′də-hīd′)n. A colorless oily aromatic aldehyde, C₇H₆O, obtained naturally, as from the bitter almond, or made synthetically and used in perfumes and as a solvent and a flavoring. benzaldehyde (bɛnˈzældɪˌhaɪd) n (Elements & Compounds) a yellowish fragrant volatile oil occurring in almond kernels and used in the manufacture of dyes, perfumes, and flavourings and as a solvent for oils and resins. Formula: C6H5CHO. Systematic name: benzenecarbaldehyde benz•al•de•hyde (bɛnˈzæl dəˌhaɪd) n. a colorless or yellowish water-soluble volatile oil, C₇H₆O, used in the synthesis of dyes, perfumes, and flavors and as a solvent. [1865–70; < German; see benz-, aldehyde] Translations benzaldeide See benzaldehyde benzaldehyde benzaldehyde (bĕnzăl`dəhīd) or benzenecarbonal (bĕn'zēnkär`bənəl), C₆H₅CHO, colorless liquid aldehydealdehyde [alcohol + New Lat. dehydrogenatus=dehydrogenated], any of a class of organic compounds that contain the carbonyl group, , and in which the carbonyl group is bonded to at least one hydrogen; the general formula for an aldehyde is RCHO, where R is hydrogen ..... Click the link for more information. with a characteristic almond odor. It boils at 180&degC;, is soluble in ethanol, but is insoluble in water. It is formed by partial oxidation of benzyl alcohol, and on oxidation forms benzoic acid. It is called oil of bitter almond, since it is formed when amygdalin, a glucoside present in the kernels of bitter almonds and in apricot pits, is hydrolyzed, e.g., by crushing the kernels or pits and boiling them in water; glucose and hydrogen cyanide (a poisonous gas) are also formed. It is also prepared by oxidation of toluene or benzyl chloride or by treating benzal chloride with an alkali, e.g., sodium hydroxide. Benzaldehyde is used in the preparation of certain aniline dyes and of other products, including perfumes and flavorings. Benzaldehyde an organic compound, C₆ H₅ CHO; a colorless, oily liquid with the odor of bitter almonds; T_m = –26° C; T_b = 179° C. Benzaldehyde dissolves in water in the proportions of 0.3 g : 100 g; it is miscible with alcohol, ether, and other organic solvents. Benzaldehyde is easily oxidized (even in air) into benzoic acid, C₆H₅COOH; however, the addition of 0.1 percent hydroquinone inhibits oxidation. Benzaldehyde combines with sodium bisulfite, hydrocyanic acid, and other molecules by a CO bond. When benzaldehyde is boiled with an alkaline solution, benzyl alcohol and benzoic acid are formed (the Cannizzaro reaction). In the presence of the CN ion, benzaldehyde enters into benzoin condensation. The condensation of benzaldehyde with acetaldehyde under the action of a base yields cinnemal-dehyde, C₆H₅CH=CHCHO; condensation with phenols and aromatic amines yields derivatives of triphenylmethane. Benzaldehyde in the form of a glycoside of amygdalin, which breaks down in water to form benzaldehyde, glucose, and hydrocyanic acid, is contained in the pits of bitter almonds and apricots, peaches, and other fruits. Benzaldehyde is obtained by the oxidation of toluene or the hydrolysis of benzylidene chloride, C₆H₅CHCl₂. The method of obtaining benzaldehyde from benzene and carbon monoxide under the action of aluminum chloride is of great significance. Benzaldehyde is used as a fragrant substance, for the synthesis of cinnemaldehyde and benzoin, and in the production of dyes of the triphenylmethane series. IA. F. KOMISSAROV benzaldehyde [benz′al·də‚hīd] (organic chemistry) C₆H₅CHO A colorless, liquid aldehyde, boiling at 170°C and possessing the odor of bitter almonds; used as a flavoring agent and an intermediate in chemical syntheses. benzaldehyde benz·al·de·hyde (ben-zal'dĕ-hīd), An aldehyde produced artificially or obtained from oil of bitter almond, containing not less than 80% of benzaldehyde; a flavoring agent used in orally administered medicines. Synonym(s): benzoic aldehyde benzaldehyde (bĕn-zăl′dĕ-hīd) A pharmaceutical flavoring agent derived from oil of bitter almond.
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