Home Categories Organic Chemistry Cyclopentane
A2276112

Cyclopentane , 96% , 287-92-3

Synonym(s):
Cyclopentane;Pentamethylene

CAS NO.:287-92-3

Empirical Formula: C5H10

Molecular Weight: 70.13

MDL number: MFCD00001356

EINECS: 206-016-6

Update time: 2022-07-08

PRODUCT 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℃

Description and Uses

Cyclopentane is a colorless liquid. Molecularweight=70.15; Specific gravity=(H2O:1)=0.75; Boilingpoint=49℃; Freezing/Melting point=2 93.6℃; Vaporpressure=400 mmHg at 31℃; Relative vapor density (air-5 1)=2.42: Flash point=37.2℃; Autoignitiontemperature=361℃. Explosive limits in air: LEL=1.1%;UEL=8.7%. Hazard Identification (based on NFPA-704 MRating System): Health 1, Flammability 3, Reactivity 0.Insoluble in water

As a laboratory reagent; in the manufacture of pharmaceuticals; found in solvents and in petroleum ether; propellant pressurizing agent.

Safety

Symbol(GHS) 
GHS02
Signal word  Danger
Hazard statements  H225-H412
Precautionary statements  P210-P273
Hazard Codes  F
Risk Statements  11-52/53
Safety Statements  9-16-29-33-61
RIDADR  UN 1146 3/PG 2
OEB A
OEL TWA: 600 ppm (1720 mg/m3)
WGK Germany  1
RTECS  GY2390000
Autoignition Temperature 682 °F
TSCA  Yes
HS Code  2902 19 00
HazardClass  3
PackingGroup  II
Toxicity LC (2 hr in air) in mice: 110 mg/l (Lazarew)

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