3-NITROBENZENESULFONIC ACID
- CAS No.
- 98-47-5
- Chemical Name:
- 3-NITROBENZENESULFONIC ACID
- Synonyms
- M-NITROBENZENE SULFONIC ACID;NSC 166284;3-nitrophenylsulfonicacid;m-nitro-benzenesulfonicaci;m-Nitrophenylsulfonic acid;M-NITROBENZENSULFONIC ACID;3-nitro-benzenesulfonicaci;3-NITROBENZENESULFONIC ACID;3-nitrobenzenesulphonicacid;META-NITROBENZENESULPHONICACID
- CBNumber:
- CB9251104
- Molecular Formula:
- C6H5NO5S
- Molecular Weight:
- 203.17
- MDL Number:
- MFCD00064383
- MOL File:
- 98-47-5.mol
| Melting point | 103-104℃ |
|---|---|
| Density | 1.637 |
| refractive index | 1.5380 (estimate) |
| Water Solubility | Completely soluble in water |
| form | solid |
| pka | -1.21±0.18(Predicted) |
| color | White to Light yellow |
| CAS DataBase Reference | 98-47-5(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| EPA Substance Registry System | Benzenesulfonic acid, 3-nitro- (98-47-5) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS05 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H314 | |||||||||
| Precautionary statements | P260-P280-P301+P330+P331 | |||||||||
| Risk Statements | 34 | |||||||||
| Safety Statements | 26-36/37/39 | |||||||||
| RIDADR | 2305 | |||||||||
| RTECS | DB7190000 | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 2904990090 | |||||||||
| NFPA 704 |
|
3-NITROBENZENESULFONIC ACID Chemical Properties,Uses,Production
Chemical Properties
Crystals. Soluble in water and alcohol.
Uses
Organic synthesis. The sodium salt is a protective antireduction agent.
Uses
3-Nitrobenzenesulfonic acid is used primarily as a mild oxidizing agent or as a precursor for colorant intermediates. In the former case it is used in processing certain anthraquinone intermediates (e.g., amination of anthraquinone-1-sulfonic acid to give 1- aminoanthraquinone) or as a dye-printing auxiliary to obtain resist effects with, for example, vat dyes. Reduction of 3-nitrobenzenesulfonic acid (usually as a liquor) to the important metanilic acid is achieved with iron or by catalytic hydrogenation. The alternative reduction with zinc and alkali or with sodium amalgam yields hydrazobenzene-3,3'-disulfonic acid, which rearranges to benzidine-2,2' - disulfonic acid [117-61-3] on treatment with acid.
Production Methods
3-Nitrobenzenesulfonic acid is produced by dissolving nitrobenzene in 98 % sulfuric acid and heating to 80 ℃. Then 65 % oleum is added at this temperature, and the reaction is completed by heating for 9 h at 105 ℃ (higher temperatures are unsafe). After quenching the sulfonation mass in water, neutralizing with lime, and filtering off gypsum, the calcium salt of the product is converted to the sodium salt with sodium carbonate. After calcium carbonate has been removed by filtration, the sodium salt solution can be used directly or evaporated.
Safety Profile
A skin and severe eye irritant. Decomposes violently at about 200°. Mixture with sulfuric acid + sulfur trioxide may explode above 150°C. When heated to decomposition it emits toxic fumes of SOx and NOx. See also NITRO COMPOUNDS OF AROMATIC HYDROCARBONS and SULFONATES.
3-NITROBENZENESULFONIC ACID Preparation Products And Raw materials
Raw materials
Preparation Products
98-47-5(3-NITROBENZENESULFONIC ACID)Related Search:
1of4