Product Identification

Product Name

2,2-Dimethyloxirane

Synonyms

2,2-Dimethyloxirane
Isobutene oxide
Isobutylene epoxide

CAS

558-30-5

Formula

C4H8O

Molecular Weight

72.11

EINECS

209-193-8

RTECS

TZ3580000

RTECS Class

Mutagen

Beilstein/Gmelin

102408

Beilstein Reference

5-17-01-00058

EC Class

highly flammable, corrosive

Physical and Chemical Properties

Solubility in water

30 g/L (20 C)

Boiling Point

50.5

Vapor Pressure

2355 (20 C)

Density

0.808 g/cm3 (20 C)

Refractive Index

1.38 (20 C)

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes. Wash skin with soap and water.

Eyes

In case of contact with substance, immediately flush with running water for at least 20 minutes.

Hazards Identification

Ingestion

May cause toxic effects.

Inhalation

Vapors may cause dizziness or suffocation. May cause toxic effects.

Skin

Contact with substance may cause severe burns.

Eyes

See Skin.

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 34 68

EC Safety Phrase

S 16 23 33 36/37/39 45

UN (DOT)

2924

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Fire Fighting Measures

Flash Point

-32.5

Autoignition

345

Fire Fighting

Small Fires: Dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Large Fires: Water spray, fog or alcohol-resistant foam.

Upper exp. limit

13.5

Lower exp. limit

1.5

Fire Potential

Flammable/combustible material. May be ignited by heat, sparks or flames.

Accidental Release Measures

Small spills/leaks

Make no contact with the spilled material. Fully encapsulating, vapor protective clothing should be worn for spills and leaks with no fire. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.

Transport Information

UN Number

2924

HS Code

2910 90 00

Stability and Reactivity

Combustion Products

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