3,4-Dichloroaniline

Description

3,4-Dichloroaniline, 1-amino- 3,4- dichlorobenzene, is a gray to dark-brown crystalline solid at room temperature. It is used as an intermediate for pesticides and dyes and is produced by catalytic hydrogenation of 3,4-dichloronitrobenzene with noble metal catalysts under pressure. Various types of additives prevent dehalogenation during production and reactors must be fabricated with special steel alloys to inhibit corrosion .

Chemical properties

brown solid

The Uses of 3,4-Dichloroaniline

3,4-Dichloroaniline is used in the preparation of the herbicide propanil (P760840).

The Uses of 3,4-Dichloroaniline

3,4-Dichloroaniline is used as an intermediate for pesticides and dyes.

The Uses of 3,4-Dichloroaniline

3,4-Dichloroaniline may be employed as derivatization reagent for the HPLC analysis of perfluorooctanoic acid (PFOA).

Preparation

3,4-Dichloroaniline is produced by catalytic hydrogenation of 3,4-dichloronitrobenzene with noble metal catalysts under pressure. Various types of additives prevent dehalogenation during production and reactors must be fabricated with special steel alloys to inhibit corrosion.

Definition

ChEBI: A dichloroaniline having the two chloro-substituents at the 3- and 4-positions.

General Description

Light tan to dark gray crystals or brown solid. Melting point 71-72°C.

Air & Water Reactions

Sensitive to prolonged exposure to heat, light and air. Darkens in storage. Insoluble in water.

Reactivity Profile

3,4-Dichloroaniline is incompatible with oxidizing agetns, acids, acid chlorides and acid anhydrides. 3,4-Dichloroaniline can decompose at low pH. Hydrochloric acid accelerates decomposition. Reacts at temperatures above 356°F in the presence of ferric chloride .

Fire Hazard

3,4-Dichloroaniline is combustible.

Metabolic pathway

The basidiomycete Filoboletus sp. TA9054 metabolizes 3,4-dichloroaniline and forms several condensation products on solid media and in liquid culture, and no oligomers are produced. Six metabolites are identified as 3,3'-4,4'- tetrachloroazobenzene, 4-(3,4-dichloroanilino)-3,3',4' - trichloroazobenzene, 4-[(3,4-dichloroanilino)-4-(3,4- dichloroanilino)]-3,3'4'-trichloroazobenzene, 2-(3,4- dichloroanilino)-N-(3,4-dichlorophenyl)-4- (chlorophenylene), 6-(3,4-dichloroanilino)-N-(3,4- dichlorophenyl)-4-(chlorophenylene), and 3,5-bis(3,4- dichloroanilino)-1,4-chlorobenzoquinone.

Purification Methods

Crystallise the aniline from MeOH. [Beilstein 12 IV 1257.]