2-Methylthiophene

  • alpha-Methylthiophene
  • Thiophene, 2-methyl-
Formula
C5H6S
Structure
Description
Clear, colorless liquid.

Registry Numbers and Inventories.
CAS
554-14-3
EC (EINECS/ELINCS)
209-063-0
EC Class
highly flammable
R 11 20
S 16 23 36/37
RTECS
XM9625000
RTECS class
Other
UN (DOT)
1993
Beilstein/Gmelin
103734
Beilstein Reference
5-17-01-00324
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C5H6S
Formula mass
98.17
Melting point, °C
-63
Boiling point, °C
113
Vapor pressure, mmHg
48
Density
1.0231 g/cm3 (15 C)
Solubility in water
Slightly soluble
Viscosity
0.70 cp (20 C)
Refractive index
1.5203 (20 C)
Heat of fusion
9.5 kJ/mol
Heat of vaporization
34.11 kJ/mol
Heat of combustion
-3474 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 contact with eyes, skin, and clothing. Take precautionary measures against static discharges. Do not breathe dust or fumes.
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
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing materials, strong bases.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
8
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. Use water spray to keep fire-exposed containers cool. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
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.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
May cause irritation of the digestive tract. May be harmful if swallowed.
   Inhalation
Causes respiratory tract irritation. May be harmful if inhaled. May cause nausea, dizziness, and headache.
   Skin
Causes mild skin irritation. May be harmful if absorbed through the skin.
   Eyes
Causes mild eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1993
Response guide
Hazard class
3
Packing Group
I; II; III
 
HS Code
2934 99 90