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12635

Sigma-Aldrich

Benzenesulfonic acid

98.0% (T)

Synonym(s):

Phenylsulfonic acid

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About This Item

Linear Formula:
C6H5SO3H
CAS Number:
98-11-3
Molecular Weight:
158.18
Beilstein/REAXYS Number:
742513
EC Number:
202-638-7
MDL number:
MFCD00011689
UNSPSC Code:
12352106
PubChem Substance ID:
57647013
NACRES:
NA.22

Quality Level

200

assay

98.0% (T)

form

solid

impurities

≤1.0% water

SMILES string

OS(=O)(=O)c1ccccc1

InChI

1S/C6H6O3S/c7-10(8,9)6-4-2-1-3-5-6/h1-5H,(H,7,8,9)

InChI key

SRSXLGNVWSONIS-UHFFFAOYSA-N

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General description

Benzenesulfonic acid (BSA), also known as phenylsulfonic acid, is the simplest aromatic sulfonic acid. It is also used as a catalyst for Michael′s reactions and in the oxidative alkenylation process.

Application

Benzenesulfonic acid is an aryl sulfonic acid that can be used:
  • As an oxidizing agent in the synthesis of Fe(III) benzenesulfonate.
  • As a catalyst during the vapor-phase nitration of benzene.
  • As a reagent in the synthesis of organic salts.
  • To form an organic salt with 5,7-dimethyl-1,8-naphthyridine-2-amine, that can be a synthon for developing supramolecular structures.
  • As a dopant for the polymerization of pyrrole to form poly(pyrrole), a conducting polymer useful in the development of flexible capacitors.

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

hcodes

H302,H314

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1B

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Dodecylbenzenesulfonic acid solution 70 wt. % in isopropanol

Sigma-Aldrich

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Sulfur hexafluoride (SF(6)) has been widely used in a variety of industrial processes, but it is one of the most potent greenhouse gases. For this reason, it is necessary to separate or collect it from waste gas streams. One separation
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A neutral catalytic system for Michael reactions of indoles has been developed by combining silica-supported benzenesulfonic acid sodium salt with hydrophobic ionic liquid in water. An efficient hydrophobic environment could be created on the surface of the silica-sodium material under
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