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Cyclopentane Structure

Cyclopentane

Chemical Properties

Melting point -94 °C (lit.)
Boiling point 50 °C (lit.)
Density  0.751 g/mL at 25 °C (lit.)
vapor density  ~2 (vs air)
vapor pressure  18.93 psi ( 55 °C)
refractive index  n20/D 1.405(lit.)
Flash point −35 °F
storage temp.  Store below +30°C.
solubility  0.156g/l insoluble
form  Powder
color  White
Odor Like gasoline; mild, sweet.
explosive limit 1.5-8.7%(V)
Water Solubility  Miscible with ethanol, ether and acetone. Slightly miscible with water.
λmax λ: 198 nm Amax: 1.0
λ: 210 nm Amax: 0.50
λ: 220 nm Amax: 0.10
λ: 240-400 nm Amax: 0.01
Merck  14,2741
BRN  1900195
Henry's Law Constant 0.164, 0.240, and 0.300 at 27.9, 35.8, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995)
Exposure limits TLV-TWA 600 ppm (~1720 mg/m3) (ACGIH).
Dielectric constant 1.9(20℃)
Stability Stable. Highly flammable. Note low flash point and wide explosion limits. Incompatible with strong oxidizing agents. Floats on water, so water is of limited value in putting out fires involving this material.
LogP 3 at 20℃
CAS DataBase Reference 287-92-3(CAS DataBase Reference)
NIST Chemistry Reference Cyclopentane(287-92-3)
EPA Substance Registry System Cyclopentane (287-92-3)

Safety Information

Hazard Codes  F
Risk Statements  11-52/53
Safety Statements  9-16-29-33-61
RIDADR  UN 1146 3/PG 2
WGK Germany  1
RTECS  GY2390000
Autoignition Temperature 682 °F
TSCA  Yes
HS Code  2902 19 00
HazardClass  3
PackingGroup  II
Hazardous Substances Data 287-92-3(Hazardous Substances Data)
Toxicity LC (2 hr in air) in mice: 110 mg/l (Lazarew)

MSDS

Usage And Synthesis

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