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Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration Featured Image
  • Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration
  • Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration
  • Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration
  • Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration
  • Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration

Energy-Efficient and Cost-Effective Cyclopentane for Refrigeration

Cyclopentane (also called C pentane) is a highly flammable alicyclic hydrocarbon with chemical formula C5H10 and CAS number 287-92-3, consisting of a ring of five carbon atoms each bonded with two hydrogen atoms above and below the plane. It occurs as a colorless liquid with a petrol-like odor. Its melting point is −94 °C and its boiling point is 49 °C. Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more rings of carbon atoms. It is formed by cracking cyclohexane in the presence of alumina at a high temperature and pressure.


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Physical Properties

CAS Number
  • 287-92-3 
EC Number
  • 206-016-6

Properties
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
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]

Packaging, storage and transportation

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Uses

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

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