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3-NITROBENZENESULFONIC ACID

3-NITROBENZENESULFONIC ACID Basic information
Product Name:3-NITROBENZENESULFONIC ACID
Synonyms:Kyselina 3-nitrobenzensulfonova;Kyselina nitrobenzen-m-sulfonova;kyselina3-nitrobenzensulfonova;kyselinanitrobenzen-m-sulfonova;m-nitro-benzenesulfonicaci;Benzene, 1-nitro-3-sulfonic acid;META-NITROBENZENESULPHONICACID;3-NITROBENZENESULFONIC ACID HYDRATE
CAS:98-47-5
MF:C6H5NO5S
MW:203.17
EINECS:202-671-7
Product Categories:
Mol File:98-47-5.mol
3-NITROBENZENESULFONIC ACID Structure
3-NITROBENZENESULFONIC ACID Chemical Properties
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 Reference98-47-5(CAS DataBase Reference)
EPA Substance Registry SystemBenzenesulfonic acid, 3-nitro- (98-47-5)
Safety Information
Risk Statements 34
Safety Statements 26-36/37/39
RIDADR 2305
RTECS DB7190000
HazardClass 8
PackingGroup II
HS Code 2904990090
MSDS Information
3-NITROBENZENESULFONIC ACID Usage And Synthesis
Chemical PropertiesCrystals. Soluble in water and alcohol.
UsesOrganic synthesis. The sodium salt is a protective antireduction agent.
Uses3-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 Methods3-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 ProfileA 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
Preparation ProductsSodium 3-nitrobenzenesulphonate-->2-AMINOANTHRAQUINONE-->3-Hydroxy-4-methoxybenzaldehyde-->DISPERSE RED 277
Tag:3-NITROBENZENESULFONIC ACID(98-47-5) Related Product Information
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