2-NITROBENZENESULFONIC ACID
- CAS NO.：80-82-0
- Empirical Formula: C6H5NO5S
- Molecular Weight: 203.17
- MDL number: MFCD00053617
- EINECS: 201-311-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-03-30 16:09:24
What is 2-NITROBENZENESULFONIC ACID?
Chemical properties
Pale yellow crystals. Melting point 70 ℃.
The Uses of 2-NITROBENZENESULFONIC ACID
Used as an intermediates.
Production Methods
2-Chloronitrobenzene is reacted with sodium disulfide at 80 ℃ in aqueous ethanol to give 2,2' -dinitrodiphenyl disulfide, which is isolated and treated with chlorine in mineral acid medium in the presence of nitric acid to produce 2-nitrobenzenesulfonyl chloride by oxidative chlorination. This is hydrolyzed in dilute alkali, and the liquor of the resulting 2-Nitrobenzenesulfonic Acid is reduced with Fe – acid or H2 – catalyst to orthanilic acid [88-21-1], an important diazo component in reactive dyes for cotton.
Synthesis
2-Nitrobenzenesulfonic Acid is synthesized by reacting o-Nitrobenzenesulfonyl chloride with Concentrated ammonia solution in glacial acetic acid
Properties of 2-NITROBENZENESULFONIC ACID
| Density | 1.637 |
| form | powder to crystal |
| pka | -1.43±0.18(Predicted) |
| color | Light orange to Yellow to Green |
| CAS DataBase Reference | 80-82-0(CAS DataBase Reference) |
Safety information for 2-NITROBENZENESULFONIC ACID
Computed Descriptors for 2-NITROBENZENESULFONIC ACID
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