Sulfolane

  • Tetramethylene sulfone
  • Tetrahydrothiophene 1,1-dioxide
Formula
C4H8O2S
Structure
Description
Colorless oily liquid with a weak oily odor.
Uses
Selective solvent for liquid-vapor extractions.

Registry Numbers and Inventories.
CAS
126-33-0
EC (EINECS/ELINCS)
204-783-1
EC Index Number
016-031-00-8
EC Class
Harmful
RTECS
XN0700000
RTECS class
Drug; Primary Irritant
Merck
12,9128
Beilstein/Gmelin
107765
Beilstein Reference
5-17-01-00039
Swiss Giftliste 1
G-4511
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H8O2S
Formula mass
120.17
Melting point, °C
26
Boiling point, °C
285
Decomposition point, °C
220
Vapor pressure, mmHg
5 (118 C)
Vapor density (air=1)
>4
Critical temperature
582
Critical pressure
71.95
Density
1.293 g/cm3
Solubility in water
Soluble
Viscosity
10.30 cp (30 C)
Surface tension
35.5 g/s2
Refractive index
1.481 (20 C)
Dipole moment
4.8 D (20 C)
Dielectric constant
44 (20 C)
Partition coefficient, pKow
-0.77
Heat of fusion
1.4 kJ/mol
Heat of vaporization
54.5 kJ/mol
Heat of combustion
-2626 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
177
Autoignition, °C
528
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Containers may explode in the heat of a fire. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Cool containers with flooding quantities of water until well after fire is out.
Hazards
Toxic, irritating gases may be generated in fires.
Combustion products
Toxic, irritating gases may be generated in fires.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
   Ingestion
May cause irritation of the digestive tract. May be harmful if swallowed. This is a convulsant in animals. Symptoms of neruotoxicity have been observed in rats, dogs, and monkeys after ingestion, injection, inhalation or dermal application. Effects included convulsions, tremors, hyperactivity and ataxia.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
USCG CHRIS Code
SFL
 
HS Code
2934 99 90
 
IMO Chemical Code
18
IMO Pollution Category
D