2-CHLORO-5-NITROBENZENESULFONIC ACID Chemical Properties

Melting point:

>300°C

Density 

1.651 (estimate)

refractive index 

1.6000 (estimate)

storage temp. 

Refrigerator

form 

solid

pka

-1.73±0.33(Predicted)

CAS DataBase Reference

96-73-1(CAS DataBase Reference)

EPA Substance Registry System

Benzenesulfonic acid, 2-chloro-5-nitro- (96-73-1)

2-CHLORO-5-NITROBENZENESULFONIC ACID Usage And Synthesis

Chemical Properties

Tan Solid

Physical properties

2-Chloro-5-nitrobenzenesulfonic Acid, crystallizes as the dihydrate from water (mp 169 ℃, decomp.). The compound undergoes explosive decomposition when heated above 200 ℃, and all reactions, including its production, must be undertaken with great caution.

Uses

Amination of 2-Chloro-5-nitrobenzenesulfonic Acid gives 4-nitroaniline- 2-sulfonic acid [96-75-3], which is used as a diazo component or reduced to the important colorant intermediate 2,5-diaminobenzenesulfonic acid [88-45-9]. Chlorination of 2-Chloro-5-nitrobenzenesulfonic Acid in aqueous solution is a more facile route to 2,6- dichloro-4-nitroaniline than chlorination of 4-nitroaniline.

Production Methods

4-Chloronitrobenzene is sulfonated with 65 % oleum at 115 ℃; special precaution must be taken to control temperature. Work-up is by quenching and isolation of the sodium salt after it has been salted out.

2-CHLORO-5-NITROBENZENESULFONIC ACID(96-73-1)Related Product Information

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• 4-CHLORO-3-NITROBENZENESULFONIC ACID POTASSIUM SALT
• 3-Chloro-5-nitrobenzenesulfonic acid