Cyclobutene

Formula
C4H6
Structure

Registry Numbers and Inventories.
CAS
822-35-5
EC (EINECS/ELINCS)
212-496-8
UN (DOT)
1012
Beilstein/Gmelin
635681
Beilstein Reference
4-05-00-00207
Korea ECL
Listed

Properties.
Formula
C4H6
Formula mass
54.09
Melting point, °C
-119
Boiling point, °C
2
Vapor pressure, mmHg
742 (1.9 C)
Critical temperature
230
Critical pressure
52.0
Density
0.733 g/cm3 (0C)
Solubility in water
Slightly soluble
Partition coefficient, pKow
1.35

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Make no contact with the spilled material. ELIMINATE ignition sources and ground all equipment. DO NOT OPERATE RADIO TRANSMITTERS WITHIN 100 meters OF ELECTRIC DETONATORS. DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF A SPECIALIST.
Stability
No data.

Fire.
Flash Point,°C
-71
Upper exp. limit, %
12.9
Lower exp. limit, %
2
Fire fighting
Use plenty of water - FLOOD it! If water is not available, use carbon dioxide, dry chemical or dirt.
Hazards
May explode and throw fragments 500 meters or more if fire reaches cargo.
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.
   Inhalation
May cause irritation.
   Skin
See inhalation.
   Eyes
See inhalation.

First aid
 
   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. Flush with running water for at least 20 minutes.
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
1012
Response guide
Hazard class
2.1