| Identification | More | [Name]
2-CHLORO-5-NITROBENZENESULFONIC ACID | [CAS]
96-73-1 | [Synonyms]
2-CHLORO-5-NITROBENZENESULFONIC ACID
2-CHLORO-5-NITROBENZENESULPHONIC ACID
2-CHLORO-5-NITROSULFOBENZENE
4-NITROCHLOROBENZENE-2-SULFONIC ACID
P-NITROCHLOROBENZENE-O-SULFONIC ACID
2-chloro-5-nitro-benzenesulfonicaci
Benzenesulfonic acid, 2-chloro-5-nitro- | [EINECS(EC#)]
202-528-9 | [Molecular Formula]
C6H4ClNO5S | [MDL Number]
MFCD00065336 | [Molecular Weight]
237.62 | [MOL File]
96-73-1.mol |
| Hazard Information | Back Directory | [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.
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