Sodium 4-toluenesulfonate

Structural formula
General
Surname	Sodium 4-toluenesulfonate
other names	Sodium p -toluenesulfonate p -sodium toluenesulfonate Sodium toluenesulfonate (ambiguous) Sodium tosylate
Molecular formula	C 7 H 7 NaO 3 S
Brief description	beige solid
External identifiers / databases
CAS number 657-84-1 12068-03-0 (structural isomer mixture) PubChem 3720192 Wikidata Q16585175
properties
Molar mass	194.19 g mol −1
Physical state	firmly
Melting point	> 300 ° C
solubility	soluble in water sparingly soluble in ethanol
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 319 P: 305 + 351 + 338
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium toluene-4-sulfonate is a chemical compound of sodium from the group of sulfonates . It is the sodium salt of p -toluenesulfonic acid .

Extraction and presentation

Sodium toluene-4-sulfonate can be obtained by sulfonating toluene with sulfuric acid and sodium chloride , whereby the isomeric sodium toluene-2-sulfonate is formed in addition to sodium toluene-4-sulfonate .

${\displaystyle \mathrm {C_{7}H_{8}+H_{2}SO_{4}\longrightarrow C_{7}H_{8}O_{3}S+H_{2}O+NaCl\longrightarrow C_{7}H_{7}NaO_{3}S+HCl+H_{2}O} }$

properties

Sodium toluene-4-sulfonate is a flammable, difficult to ignite, beige solid that is soluble in water. A melting point of around 500 ° C is assumed, but the compound decomposes before this temperature is reached.

use

Sodium toluene-4-sulfonate is used as a carrier electrolyte for the deposition of polypyrrole membranes . It is also used as a solvent to study the properties of resin particles and in the textile industry.

Related links

• Sodium toluene-2-sulfonate , CAS number: 15046-75-0
• Sodium toluene-3-sulfonate , CAS number: 38251-37-5

Individual evidence

1. ↑ ^{a b c d e f} Entry on sodium toluene-4-sulfonate in the GESTIS substance database of the IFA , accessed on January 8, 2018(JavaScript required) .
2. ↑ WLF Armarego, Christina Li Lin Chai: Purification of Laboratory Chemicals . Butterworth-Heinemann, 2013, ISBN 0-12-382161-4 , pp. 979 ( limited preview in Google Book Search).
3. ↑ Peter Kurzweil, Paul Scheipers: Chemistry basics, structural knowledge, applications and experiments . Springer-Verlag, 2010, ISBN 978-3-8348-0341-2 , pp. 226 ( limited preview in Google Book search).
4. ↑ oecd.org: SIDS INITIAL ASSESSMENT PROFILE , accessed on July 16, 2016.
5. ↑ Data sheet Sodium p-toluenesulfonate, 95% from Sigma-Aldrich , accessed on July 15, 2016 ( PDF ).
6. ^ Hermann Rath: Textbook of textile chemistry including textile chemical technology . Springer-Verlag, 2013, ISBN 978-3-642-80649-0 , pp. 784 ( limited preview in Google Book search).