BENZALDEHYDE LR

Description

BENZALDEHYDE LR. Benzaldehyde is an organic compound consisting of a benzene ring with a formyl substituent. It is the simplest aromatic aldehyde and one of.

Application

Benzaldehyde (C₆H₅CHO), the simplest representative of the aromatic aldehydes, occurring naturally as the glycoside amygdalin. Prepared synthetically, it is used chiefly in the manufacture of dyes, cinnamic acid, and other organic compounds, and to some extent in perfumes and flavouring agents.

Technical specification

Physical state at 20 °C : Liquid.

Odour : characteristic odor

Odour threshold : No data available.

pH value : Not applicable.

Melting point [°C] : - 26 °C

Decomposition point [°C] : N/A

Critical temperature [°C] : N/A

Auto-ignition temperature [°C] : N/A

Flammability (solid, gas) : N/A

Flash point [°C] : 64 °C

Boiling point [°C] : 177 - 179 °C

Initial boiling point [°C] : 177 °C

Final boiling point [°C] : 179 °C

Evaporation rate : N/A

Vapour pressure [20°C] : N/A

Vapour pressure mm/Hg : 1 mm Hg @ 260C

Vapour density : 3,66

Density [g/cm3] : 1,05

Relative density, gas (air=1) : N/A

Relative density, liquid (water=1) : N/A

Solubility in water [% weight] : Slightly soluble in

Solubility in water : N/A

Log Pow octanol / water at 20°C : No data available.

Solubility : 5,9

Viscosity at 40°C [mm2/s] : N/A

Explosive properties : N/A

Explosion limits - upper [%] : 8,50%

Explosion limits - lower [%] : 1,40%

Oxidising properties : No data available

Notes

The azlactone of α-acetaminocinnamic acid may also be prepared by substituting the equivalent amount of glycine for acetylglycine and increasing the amount of acetic anhydride to three molecular proportions, but the yield is only about 45–50 per cent of the theoretical amount.

Procedure

Benzaldehyde undergoes disproportionation upon treatment with concentrated alkali one molecule of the aldehyde is reduced to the benzyl alcohol and another molecule is simultaneously oxidized to benzoic acid Benzaldehyde undergoes disproportionation upon treatment with concentrated alkali one molecule of the aldehyde is reduced to the benzyl alcohol and another molecule is simultaneously oxidized to benzoic acid.

BENEDICT’S REAGENT QUANTITATIVE