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142-29-0

Name Cyclopentene
CAS 142-29-0
EINECS(EC#) 205-532-9
Molecular Formula C5H8
MDL Number MFCD00001394
Molecular Weight 68.12
MOL File 142-29-0.mol

Chemical Properties

Appearance colourless liquid with a petrol-like odour
Melting point  −135 °C(lit.)
Boiling point  44-46 °C(lit.)
density  0.771 g/mL at 25 °C(lit.)
vapor pressure  20.89 psi ( 55 °C)
refractive index  n20/D 1.421(lit.)
Fp  <−30 °F
storage temp.  0-6°C
solubility  water: soluble0.535g/L at 25°C
form  Liquid
color  Colorless
Specific Gravity 0.771
Stability: Stable. Highly flammable. Incompatible with strong oxidizing agents. Store cold.
Water Solubility  immiscible
Sensitive  Air Sensitive
BRN  635707
Henry's Law Constant 6.3 x 10-2 atm?m3/mol at 25 °C (Hine and Mookerjee, 1975)
InChIKey LPIQUOYDBNQMRZ-UHFFFAOYSA-N
LogP 2.47 at 25℃
CAS DataBase Reference 142-29-0(CAS DataBase Reference)
NIST Chemistry Reference Cyclopentene(142-29-0)
EPA Substance Registry System 142-29-0(EPA Substance)

Safety Data

Hazard Codes  F,Xn
Risk Statements 
R11:Highly Flammable.
R21/22:Harmful in contact with skin and if swallowed .
R36/37/38:Irritating to eyes, respiratory system and skin .
R65:Harmful: May cause lung damage if swallowed.
R67:Vapors may cause drowsiness and dizziness.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
Safety Statements 
S9:Keep container in a well-ventilated place .
S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S33:Take precautionary measures against static discharges .
S36:Wear suitable protective clothing .
S62:If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S36/37:Wear suitable protective clothing and gloves .
RIDADR  UN 2246 3/PG 2
WGK Germany  3
RTECS  GY5950000
10-23
Autoignition Temperature 743 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29021990
Safety Profile
Moderately toxic by ingestion and skin contact. A very dangerous fire hazard when exposed to flame or heat; can react with oxidning materials. Keep away from heat and open flame. To fight fire, use foam, CO2, dry chemical.
Toxicity
Acute oral LD50 for rats is 1,656 mg/kg (quoted, RTECS, 1985).

Hazard Information

Material Safety Data Sheet(MSDS)

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