What is the Benzenesulfonic acid?

Benzenesulfonic acid is green solid, while it's Molecular Formula is C6H6O3S. green solid Benzenesulfonic acid is an aryl sulfonic acid that can be used to form an organic salt with 5,7-dimethyl-1,8-naphthyridine-2-amine, that can be a synthon for developing supramolecular structures. It can also act as a dopant for the polymerization of pyrrole to form poly(pyrrole), a conducting polymer useful in the development of flexible capacitors.

What is the CAS number for Benzenesulfonic acid?

The CAS number of Benzenesulfonic acid is 98-11-3.

What is Benzenesulfonic acid (98-11-3) used for?

Benzene sulfonic acid is an organo sulfur compound with the formula C6H5SO3H. It is the simplest aromatic sulfonic acid. It forms colorless deliquescent sheet crystals or a white waxy solid that is soluble in water and ethanol, slightly soluble in benzene and insoluble in carbon disulfide and diethyl ether. It is often stored in the form of alkali metal salts. Its aqueous solution is strongly acidic.InChI:InChI=1/C6H6O3S.H2O/c7-10(8,9)6-4-2-1-3-5-6;/h1-5H,(H,7,8,9);1H2

What is the Benzenesulfonic acid?

Benzenesulfonic acid is green solid, while it's Molecular Formula is C6H6O3S. green solid Benzenesulfonic acid is an aryl sulfonic acid that can be used to form an organic salt with 5,7-dimethyl-1,8-naphthyridine-2-amine, that can be a synthon for developing supramolecular structures. It can also act as a dopant for the polymerization of pyrrole to form poly(pyrrole), a conducting polymer useful in the development of flexible capacitors.

What is the CAS number for Benzenesulfonic acid?

The CAS number of Benzenesulfonic acid is 98-11-3.

What is Benzenesulfonic acid (98-11-3) used for?

Benzene sulfonic acid is an organo sulfur compound with the formula C6H5SO3H. It is the simplest aromatic sulfonic acid. It forms colorless deliquescent sheet crystals or a white waxy solid that is soluble in water and ethanol, slightly soluble in benzene and insoluble in carbon disulfide and diethyl ether. It is often stored in the form of alkali metal salts. Its aqueous solution is strongly acidic.InChI:InChI=1/C6H6O3S.H2O/c7-10(8,9)6-4-2-1-3-5-6;/h1-5H,(H,7,8,9);1H2

Benzenesulfonic acid

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Benzenesulfonic acid

Name Benzenesulfonic acid
CAS 98-11-3
Purity 99%

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Molecular Formula: C6H6O3S
Molecular Weight: 158.178
Appearance/Colour: green solid
Vapor Pressure: 3.07E-08mmHg at 25°C
Melting Point: 30-60 °C
Refractive Index: 1.5151 (estimate)
Boiling Point: 137℃
PKA: 0.7(at 25℃)
Flash Point: >230°F
PSA： 62.75000
Density: 1.409 g/cm³
LogP: 2.01410

Benzenesulfonic acid(Cas 98-11-3) Usage

Preparation	Benzene sulfonic acid is prepared from the sulfonation of benzene using concentrated sulfuric acid : This conversion illustrates aromatic sulfonation, which has been called "one of the most important reactions in industrial organic chemistry.".
Reactions	Benzene sulfonic acid exhibits the reactions typical of other aromatic sulfonic acids, forming sulfonamides , sulfonyl chloride, and esters. The sulfonation is reversed above 220 °C. Dehydration with phosphorus pentoxide gives benzene sulfonic acid anhydride ((C6H5SO2)2O). Conversion to the corresponding benzene sulfonyl chloride (C6H5SO2Cl) is effected with phosphorus penta chloride. It is a strong acid, being dissociated in water.
Synthesis Reference(s)	The Journal of Organic Chemistry, 61, p. 1530, 1996 DOI: 10.1021/jo9520710Tetrahedron Letters, 19, p. 1211, 1978 DOI: 10.1016/S0040-4039(01)94501-0
Air & Water Reactions	Slightly soluble in water.
Reactivity Profile	Benzenesulfonic acid reacts with bases and many organic compounds.
Fire Hazard	Flash point data for Benzenesulfonic acid are not available, however Benzenesulfonic acid is probably combustible.
Flammability and Explosibility	Nonflammable
Safety Profile	Poison by ingestion, sbn contact, and probably inhalation. A severe skin and eye irritant. See also SULFATES and SULFONATES.
Purification Methods	Purify benzenesulfonic acid by dissolving it in a small volume of distilled H2O and stirring with slightly less than the theoretical amount of BaCO3. When effervescence is complete and the solution is still acidic, filter off the insoluble barium benzenesulfonate. The salt is collected and dried to constant weight in vacuo, then suspended in H2O and stirred with a little less than the equivalent (half mol.) of sulfuric acid. The insoluble BaSO4 (containing a little barium benzenesulfonate) is filtered off and the filtrate containing the free acid is evaporated in a high vacuum. The oily residue will eventually crystallise when completely anhydrous. A 32% commercial acid is allowed to fractionally crystallise at room temperature over P2O5 in a vacuum desiccator giving finally colourless deliquescent plates m 52.5o. The anhydrous crystalline acid is deliquescent and should be stored over anhydrous Na2SO4 in the dark and should be used in subdued sunlight as it darkens under sunlight. The main impurity is Fe which readily separates as the Fe salt in the early fractions [Taylor & Vincent J Chem Soc 3218 1952]. The S-benzylisothiuronium salt has m 148o (from EtOH/H2O). It is an IRRITANT to the skin and eyes. [See Adams & Marvel Org Synth Coll Vol I 84 1941, Michael & Adair Chem Ber 10 585 1877, Beilstein 11 IV 27.]
Application	The alkali metal salt of benzene sulfonic acid was once widely used in the production of phenol : C6H5SO3Na + 2 NaOH → C6H5ONa + Na2SO3 C6H5ONa + HCl → C6H5OH + NaCl The process has been largely displaced by the Hock process, which generates less waste. Benzene sulfonic acid is mainly consumed by conversion to other specialty chemicals. A variety of pharmaceutical drugs are prepared as salts of benzene sulfonic acid and are known as besylates or besilates.
Definition	ChEBI: The simplest member of the class of a benzenesulfonic acids that consists of a benzene carrying a single sulfo group.
General Description	Deliquescent needles or large plates.