trans-2-Pentene

  • beta-trans-Amylene
  • trans-beta-Amylene
  • trans-beta-n-Amylene
  • (E)-2-Pentene
  • 2-trans-Pentene
Formula
C5H10
Structure
Description
Colorless liquid with a hydrocarbon odor. Usually in technical grade as a mixture of isomers.
Uses
Polymerization inhibitor, organic synth 2-pentene.

Registry Numbers and Inventories.
CAS
646-04-8
EC (EINECS/ELINCS)
211-461-4
R 11 65
S 9 16 23 29 33 62
RTECS
SB2184500
RTECS class
Other
UN (DOT)
2371
Merck
12,7263
Beilstein/Gmelin
1884708
Canada DSL/NDSL
DSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H10
Formula mass
70.15
Melting point, °C
-140.2
Boiling point, °C
37
Vapor density (air=1)
2.4
Density
0.6431 g/cm3 (25 C)
Solubility in water
203 mg/L @ 25 C
Surface tension
16.41 g/s2 @ 25 C
Refractive index
1.3793 (20C)

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.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. 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.
Stability
No data.
Incompatibilities
Strong oxidizing agents, acids.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
-48
Autoignition, °C
285
Upper exp. limit, %
10.6
Lower exp. limit, %
1.4
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. Water may be ineffective.
Fire potential
Flammable; dangerous fire risk. A dangerous fire and explosion hazard when exposed to heat or flame.
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
1
 
Flammability
4
 
 
Reactivity
1
 

Health.
Exposure effects
Mild central nervous system depression or excitation may occur after ingestion or vapor inhalation. CNS effects can occur secondary to hydrocarbon pneumonitis and hypoxia, or from additives and contaminants (aniline, heavy metals, camphor, or pesticides). Some hydrocarbons are simple asphyxiants (e.G., Methane, ethane, propane gasses) which can produce CNS effects secondary to hypoxia. In a prospective study in Toronto, major congenital malformations were noted in 13 of 125 fetuses of mothers exposed to organic solvents during pregnancy.
   Ingestion
The toxicological properties of this substance have not been fully investigated. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

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. 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
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2371
Response guide
Hazard class
3
Packing Group
I
 
USCG CHRIS Code
PTX
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P