n-Pentane
- C5H12
- CAS Number 109-66-0
- UN1265 (gas)
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Liquid / Gas Volumes
Calculate the volume or mass of a quantity of gas or liquid
Liquid Phase
At boiling point at 1.013 bar
Gas Phase
In standard conditions (1.013 bar, 15°C)
Physical Properties
Molecule phase diagram showing the transition phases between solid, liquid and gas as a function of temperature and pressure
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- Molar mass 72.149 g/mol
- Content in dry air /
-
Critical Point
- Temperature 196.55 °C
- Pressure 33.7 bar
- Density 230.51 kg/m³
-
Triple Point
- Temperature -129.73 °C
- Pressure 7.634E-7 bar
Pressure 1.013 bar
| Latent heat of fusion (at melting point) | 116.447 kJ/kg |
| Melting point | - 129.73 °C |
Pressure 1.013 bar
| Boiling point | 36.06 °C |
| Latent heat of vaporization (at boiling point) | 357.58 kJ/kg |
| Liquid density (at boiling point) | 609.71 kg/m3 |
Applications
Examples of uses of this molecule in Industry and Healthcare
Safety & Compatibility
GHS02
Flammable
GHS07
Health hazards
GHS08
Serious health hazard
GHS09
Hazardous to the environment
Autoignition Temperature, Flammability Limits & Flash Point
Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)
| Autoignition temperature (Chemsafe) | 260 °C |
| Flash point (Chemsafe) | <-20 °C |
| Lower flammability limit (IEC 80079-20-1) | 1.1 vol% |
| Upper flammability limit (IEC 80079-20-1) | 8.7 vol% |
US (according to ASTM E681 for Limits and ASTM E659 for autoignition temperature)
| Autoignition temperature (NFPA 325) | 260 °C |
| Flash point (NPFA 325) | <-40 °C |
| Lower flammability limit (NFPA 325) | 1.5 vol% |
| Upper flammability limit (NFPA 325) | 7.8 vol% |
Threshold of toxicity
| ILV-8h EU (at Patm and 293.15 K) | 3000 mg/m3 or 1000 ppm |
| PEL USA OSHA (vol) | 1000 ppm |
| VLEP 8h France (at Patm and 293.15 K) | 3000 mg/m3 or 1000 ppm |
Odor
Gasoline
Metals
| Aluminium | No data |
| Brass | No data |
| Monel | No data |
| Copper | No data |
| Ferritic Steel | No data |
| Stainless steel | No data |
| Zinc | No data |
| Titanium | No data |
Plastics
| Polytetrafluoroethylene | No data |
| Polychlorotrifluoroethylene | No data |
| Polyvinylidene fluoride | No data |
| Polyvinyl chloride | No data |
| Ethylene tetrafluoroethylene | No data |
| Polycarbonate | No data |
| Polyamide | No data |
| Polypropylene | No data |
Elastomers
| Butyl (isobutene- isoprene) rubber | No data |
| Nitrile rubber | No data |
| Chloroprene | No data |
| Chlorofluorocarbons | No data |
| Silicone | No data |
| Perfluoroelastomers | No data |
| Fluoroelastomers | No data |
| Neoprene | No data |
| Polyurethane | No data |
| Ethylene-Propylene | No data |
Lubricants
| Hydrocarbon based lubricant | No data |
| Fluorocarbon based lubricant | No data |
Materials compatibility
Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.
Learn More
More information
N-Pentane is an organic compound with the formula C5H12. Pentanes are components of some fuels and are employed as specialty solvents in the laboratory. Because of its low boiling point, low cost, and relative safety, pentanes are used as a working medium in geothermal power stations in some blended refrigerants. Pentanes are also an active ingredient in some pesticides.