Sulfolane

Structural formula
General
Surname	Sulfolane
other names	Tetrahydrothiophene-1,1-dioxide Tetramethylene sulfone
Molecular formula	C 4 H 8 O 2 S
Brief description	white, liquid, odorless mass
External identifiers / databases
CAS number 126-33-0 EC number 204-783-1 ECHA InfoCard 100.004.349 PubChem 31347 ChemSpider 29080 Wikidata Q416239
properties
Molar mass	120.17 g mol −1
Physical state	firmly
density	1.261 g cm −3 (25 ° C)
Melting point	27.4 ° C
boiling point	285 ° C
Vapor pressure	3.5 Pa (30 ° C)
solubility	very light in water (1266 g l −1 at 20 ° C)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 302-360 P: 201-202-264-280-308 + 310-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sulfolane , systematic name tetrahydrothiophene-1,1-dioxide , is a sulfone and is a polar solvent . The molecule can be described as a five-membered ring made up of four carbon atoms and a double-oxidized sulfur atom.

properties

The flash point is 165 ° C, the specific heat capacity is 1.5 J / (g · K). Sulfolane is assigned to the water hazard class WGK  1.

use

In technology it is used as a solvent , e.g. B. for the extraction of aromatics . It is used in gas cleaning to separate sulfur compounds.

Unlike dimethyl sulfoxide or dimethyl sulfone , it cannot be used medicinally to transport substances (e.g. drugs ) through cell membranes as a solvent , since it is itself relatively toxic and its ability to transport biomembrane is poor.

Individual evidence

1. ↑ ^{a b c d e f g h} Entry on tetrahydrothiophene-1,1-dioxide in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
2. ↑ Entry on Tetrahydrothiophene 1,1-dioxide in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
3. ↑ ( page no longer available , search in web archives: Sulfolane ) at www.sulfolane.com.