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Physical & Chemical properties

Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Basic data given in a peer reviewed journal (also assessed by OECD)
Qualifier:
no guideline followed
Principles of method if other than guideline:
Two different concentrations were prepared in 100 ml of 1-octanol and shaken with 500 ml of purified water
GLP compliance:
not specified
Type of method:
shake-flask method to: flask method
Partition coefficient type:
octanol-water
Analytical method:
gas chromatography
Type:
log Pow
Partition coefficient:
4.63
Temp.:
20 °C
Remarks on result:
other: pH not reported

PH not determined

Conclusions:
The log Pow of TPP was measured as 4.63.
Executive summary:

The log Pow of TPP was measured as 4.63.

Description of key information

The partition coefficient for TPP between octanol and water has been measured experimentally and determined as Log Kow = 4.6 at ambient temperature.

Key value for chemical safety assessment

Log Kow (Log Pow):
4.6
at the temperature of:
20 °C

Additional information

Log Pow values between 4.5 and 4.7 are reported in various reputable sources. The value of 4.63 was determined by Saeger et al (1979) and a virtually identical value was obtained by Mayer et al using the same method