Pentane

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Up to 1971

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP status not known, information from a published handbook, acceptable with restrictions.

Principles of method if other than guideline:

The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the Handbook of Vapor Pressures and Heats of Vapourization of Hydrocarbons and Related Compounds states that data included has been collected, calculated, critically selected and compiled. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.

GLP compliance:

not specified

Remarks:

Not reported

Type of method:

other: No data reported

Key result

Temp.:

70 °F

Vapour pressure:

8.563 PSI

Conclusions:

N-pentane has vapour pressure of 8.563PSI at 70F. This is the equivalent of 58.59 kPa at 294.26 K.

Executive summary:

No information on the primary source of this data or the methods used is available. However, this information is taken from a reliable peer reviewed handbook and so can be considered reliable and suitable for use as the key study for this endpoint. Therefore n-pentane has a vapour pressure of 8.563PSI at 70F. This is the equivalent of 58.59 kPa at 294.26 K.

Description of key information

The vapour pressure is between 45 and 79 kPa at 20°C for n-pentane based on calculated values.

Key value for chemical safety assessment

Vapour pressure:

58.6 kPa

at the temperature of:

21 °C

Additional information

The vapour pressure is between 45 and 79 kPa at 20°C for n-pentane based on calculated values. This range has been agreed by the consortium to represent the substance. This is supported by a value of 58.59 kPa at 21°C from the Handbook of vapour pressures and heats of vapourisation of hydrocarbons and related compounds (Zwolinski and Wilhoit 1971). There is no information available on the methods used to determine the value for this endpoint. However, the Handbook of Vapour Pressures is considered to be a reliable, peer-reviewed handbook and suitable for use as a study for this endpoint.