4-CHLOROBENZALDEHYDE

PRODUCT IDENTIFICATION

CAS NO. 104-88-1

4-CHLOROBENZALDEHYDE

EINECS NO. 203-247-4
FORMULA ClC6H4CHO
MOL WT.

140.57

H.S. CODE 2913.10
TOXICITY Oral rat LD50: 1575 mg/kg
SYNONYMS p-Chlorobenzenecarboxyaldehyde;
4-Chlorobenzene Carbonal; p-Chloorbenzaldehyde (Dutch); 4-Chloorbenzaldehyde (Dutch); 4-chlorbenzaldehyd (German); p-Chlorobenzaldehyde; 4-clorobenzaldeide (Italian); 4-Clorobenzaldehído (Spanish); 4-Chlorobenzaldéhyde (French);
SMILES
 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

white solid

MELTING POINT 45 - 47 C
BOILING POINT 214 C
SPECIFIC GRAVITY

 

SOLUBILITY IN WATER

negligible

AUTOIGNITION

 

pH  
VAPOR DENSITY  

AUTOIGNITION

 

REFRACTIVE INDEX

 
NFPA RATINGS  
FLASH POINT

88 C

STABILITY Stable under normal conditions

GENERAL DESCRIPTION & APPLICATIONS

Benzaldehyde(also called Benzenecarbonal) is the simplest representative of the aromatic aldehydes. It is a colorless liquid aldehyde with a characteristic almond odor. It boils at 180°C, is soluble in ethanol, but is insoluble in water. Benzaldehyde is formed by partial oxidation of benzyl alcohol and readily oxidized to benzoic acid and is converted to addition products by hydrocyanic acid or sodium bisulfite. It is also prepared by oxidation of toluene or benzyl chloride or by treating benzal chloride with an alkali, e.g., sodium hydroxide. It is used chiefly in the synthesis of other organic compounds, ranging from pharmaceuticals to plastic additives and benzaldehyde is an important intermediate for the processing of perfume and flavouring compounds and in the preparation of certain aniline dyes . It is the first step in the synthesis for fragrances. It undergoes simultaneous oxidation and reduction with alcoholic potassium hydroxide, giving potassium benzoate and benzyl alcohol. It is converted to benzoin with alcoholic potassium cyanide, with anhydrous sodium acetate and acetic anhydride, giving cinnamic acid. Compounds which do not have alpha-hydrogen atoms cannot form an enolate ion and do not undergo electrophilic alpha-substitution and aldol condensation. Aromatic aldehydes such as benzaldehyde and formaldehyde may undergo disproportionation in concentrated alkali (Cannizaro's reaction); one molecule of the aldehyde is reduced to the corresponding alcohol and another molecule is simultaneously oxidized to the salt of a carboxylic acid. The speed of the reaction depends on the substituents in the aromatic ring. Two different types of aldehydes (aromatic and aliphatic) can undergo crossing reaction to form fomaldehyde and aromatic alcohols. 4-Chlorobenzaldehyde is used as an intermediate for the manufacture of dyestuffs, optical brighteners, pharmaceuticals, agricultural chemicals and metal finishing products.
SALES SPECIFICATION

APPEARANCE

white solid

ASSAY

98.0% min

ISOMER IMPURITY

1.0% max

TRANSPORTATION
PACKING 250kgs in drum
HAZARD CLASS 6.1 (Packing group : III)
UN NO. 2811
OTHER INFORMATION
Hazard Symbols: XN, Risk Phrases: 22-36/38, Safety Phrases: 22-26-37
It is easily oxidized, it undergoes reactions involving nuchelophilic addition such as the aldol condensation.