CAS Number |
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EC Number |
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Properties |
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Chemical formula | C5H10 |
Molar mass | 70.1 g/mol |
Appearance | clear, colorless liquid |
Odor | mild, sweet |
Density | 0.751 g/cm3 |
Melting point | −93.9 °C (−137.0 °F; 179.2 K) |
Boiling point | 49.2 °C (120.6 °F; 322.3 K) |
Solubility in water | 156 mg·l−1 (25 °C)[1] |
Solubility | soluble in ethanol, acetone, ether |
Vapor pressure | 45 kPa (20 °C) [2] |
Acidity (pKa) | ~45 |
Magnetic susceptibility (χ) | -59.18·10−6 cm3/mol |
Refractive index (nD) | 1.4065 |
Hazards |
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Occupational safety and health (OHS/OSH): | |
Main hazards | Flammable[3] |
Hazard symbol | 3 |
Flash point | −37.2 °C (−35.0 °F; 236.0 K) |
Autoignition temperature |
361 °C (682 °F; 634 K) |
Explosive limits | 1.1%-8.7%[3] |
Cyclopentane has found applications in various industries. As a volatile hydrocarbon it is an incidental component of some fuels and blowing agents. In recent years, cyclopentane has been used as a refrigerant in small refrigerators and freezers as a more environmentally friendly replacement for hydrofluorocarbon refrigerants. Cyclopentane requires safety precautions to prevent leakage and ignition when used as a refrigerant as it is highly flammable.
Cyclopentane can be fluorinated to give compounds ranging from C5H9F to perfluorocyclopentane C5F10. Such species are conceivable refrigerants and specialty solvents