Thiophene

  • Thiofuran
  • Thiofurfuran
  • Thiole
  • Thiotetrole
  • Divinylene sulfide
Formula
C4H4S
Structure
Description
A colorless liquid with an unpleasant odor.
Uses
Organic synthesis, copolymerizes with maleic anhydride.

Registry Numbers and Inventories.
CAS
110-02-1
EC (EINECS/ELINCS)
203-729-4
EC Class
highly flammable, harmful, irritant, dangerous for the environment
R 11 20/21/22
S 16 26 36/37/39
RTECS
XM7350000
RTECS class
Other
UN (DOT)
2414
Merck
12,9490
Beilstein/Gmelin
103222
Beilstein Reference
5-17-01-00297
Swiss Giftliste 1
G-4415
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H4S
Formula mass
84.14
Melting point, °C
-38
Boiling point, °C
84.4
Vapor pressure, mmHg
127 (35 C)
Saturation Concentration
276 g/m3 (20 C)
Critical temperature
307
Critical pressure
56.20
Density
1.08844 g/cm3 (0 C)
Solubility in water
Insoluble
Viscosity
0.621 cp
Surface tension
32.07 g/s2 (25 C)
Refractive index
1.52684 (20 C)
Dielectric constant
2.7 (16 C)
Partition coefficient, pKow
1.81
Heat of vaporization
32.5 kJ/mol
Heat of combustion
-2807 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Flammables-area.
Handling
Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Use only in a chemical fume hood.
Protection
Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
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. Remove all sources of ignition. Use a spark-proof tool.
Disposal code
6
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
-9
Autoignition, °C
395
Upper exp. limit, %
12.5
Lower exp. limit, %
1.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide.
Fire potential
HIGHLY FLAMMABLE.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
3
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
Harmful if swallowed. May cause irritation of the digestive tract. May cause nausea and vomiting.
   Inhalation
Harmful if inhaled. May cause respiratory tract irritation.
   Skin
May cause skin irritation. Harmful if absorbed through the skin.
   Eyes
Causes eye irritation. Lachrymator.

First aid
 
   Ingestion
Get medical aid. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.

Transport.
UN number
2414
Response guide
Hazard class
3
Packing Group
II
 
HS Code
2934 99 90
 
Std. Transport #
4909197