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  • Benzaldehyde (C6H5CHO) is a chemical compound consisting of a benzene ring with an aldehyde substituent.
  • It is the simplest representative of the aromatic aldehydes and one of the most industrially used members of this family of compounds.
  • At room temperature it is a colorless liquid with a characteristic and pleasant almond-like odor benzaldehyde is an important component of the scent of almonds, hence its typical odor. Currently benzaldehyde is primarily made from toluene by a number of different processes.
  • It is the primary component of bitter almond oil extract, and can be extracted from a number of other natural sources in which it occurs, such as apricot, cherry, and laurel leaves, peach seeds and, in a glycoside combined form , in certain nuts and kernels.


  • Benzaldehyde can be obtained by many processes. Currently liquid phase chlorination or oxidation of toluene are among the most used processes.
  • On oxidation, benzaldehyde is converted into the odorless benzoic acid.
  • Benzyl alcohol can be formed from benzaldehyde by means of hydrogenation or by treating the compound with alcoholic potassium hydroxide thus undergoing a simultaneous oxidation and reduction which result in the production of potassium benzoate and benzyl alcohol.
  • Reaction of benzaldehyde with anhydrous sodium acetate and acetic anhydride yields cinnamic acid, while alcoholic potassium cyanide can be used to catalyze the condensation of benzaldehyde to benzoin.


  • While it is commonly employed as a commercial food flavourant or industrial solvent, benzaldehyde is used chiefly in the synthesis of other organic compounds, ranging from pharmaceuticals to plastic additives.
  • Benzaldehyde is also an important intermediate for the processing of perfume and flavouring compounds and in the preparation of certain aniline dyes.
  • The chemicals are not in widespread use because they damage vegetation and contaminate water supplies.


  • The quantum chemical method is employed to study the modified asymmetric allylation of benzaldehyde controlled by diisopropyl D-(-)-tartrate auxiliary.
  • There are many reports on the sensitization of formaldehyde, which is used as a preservative in cosmetic products and industrial materials.
  • Sensitization to benzaldehyde, cinnamic aldehyde and phenylacetaldehyde has been reported in humans.
  • The DNPH cartridges were extracted with acetonitrile and analyzed for aldehyde and ketone derivatives using high performance liquid chromatography.

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