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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
up to 2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Source is a published handbook, no data on GLP/guideline compliance/method. Acceptable with restriction as handbook is peer reviewed and considered a reliable source.
Guideline:
other: Unknown if guideline was used for this study
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 CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. 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 method was reported
Partition coefficient type:
octanol-water
Analytical method:
not specified
Key result
Type:
log Pow
Partition coefficient:
3.45
Temp.:
25 °C
pH:
7
Remarks on result:
other: pH not stated, therefore assumed standard
Details on results:
No further details reported
Conclusions:
The Log Kow of n-pentane is 3.45
Executive summary:

There is no available information on the methods used to determine the value for this endpoint. However, this information is taken from the CRC Handbook which is considered to be a reliable peer reviewed handbook and suitable for use as the key study for this endpoint. Therefore the Log Kow of n-pentane is 3.45.

Description of key information

The log partition co-efficient of Pentane is reported to be 3.45.

Key value for chemical safety assessment

Additional information

The information available is based on standard guidelines and peer reviewed handbook data, both considered reliable for assessment.