Product Identification

Product Name

2-Methylthiophene

Synonyms

alpha-Methylthiophene
Thiophene, 2-methyl-

CAS

554-14-3

Formula

C5H6S

Molecular Weight

98.17

EINECS

209-063-0

RTECS

XM9625000

RTECS Class

Other

Beilstein/Gmelin

103734

Beilstein Reference

5-17-01-00324

EC Class

highly flammable

Physical and Chemical Properties

Appearance

Clear, colorless liquid.

Solubility in water

Slightly soluble

Melting Point

-63

Boiling Point

113

Vapor Pressure

48

Density

1.0231 g/cm3 (15 C)

Heat Of Vaporization

34.11 kJ/mol

Heat Of Combustion

-3474 kJ/mol

Refractive Index

1.5203 (20 C)

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

Ingestion

May cause irritation of the digestive tract. May be harmful if swallowed.

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.

EC Risk Phrase

R 11 20

EC Safety Phrase

S 16 23 36/37

UN (DOT)

1993

Exposure Controls/Personal Protection

Personal 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.

Exposure Effects

The toxological properties of this substance have not been fully investigated.

Fire Fighting Measures

Flash Point

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.

Accidental Release Measures

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.

Stability and Reactivity

Disposal Code

1

Incompatibilities

Oxidizing materials, strong bases.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

1993

Hazard Class

3

Packing Group

I; II; III

HS Code

2934 99 90