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Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
07 MAR 2000 - 21 MAR 2000
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.8 (Partition Coefficient - HPLC Method)
Version / remarks:
EG-Guidline 92/69/EEC A.8.
Deviations:
no
GLP compliance:
yes
Type of method:
HPLC method
Partition coefficient type:
octanol-water
Analytical method:
high-performance liquid chromatography
Type:
log Pow
Partition coefficient:
> 4.7
Temp.:
40 °C
Remarks on result:
other: not further information available
Details on results:
Determination of the dead time t0:
Regression: tR(nc + 1) = a + b tR(nc)
Parameters: a = -1.1334 b = 1.4767 r^2 = 0.9999
Dead time: t0 = a / (1 - b)
t0 = 2.377 min

Calibration data:
Regresssion: log Pow = a + b log k'
Parameters: a = 2.992; b = 3.064; r^2 = 0.9242

log Pow of the test substance
1st injection: tR = 12.89 min
2nd injection: tR = 12.90 min
mean: tR = 12.90 min
k' = 4.42
log k' = 0.65
log Pow = 5.0
Conclusions:
The logPow was found to be > 4.7 (Pow > 50119).
Executive summary:

The partition coefficient n-octanol/water of the test substance was determined according to the "HPLC method" described in EG-Guideline 92/69/EEC A.8., following GLP.

The log Pow was found to be > 4.7 (Pow > 50119), referred to log Pow of the standard fluoranthene. The calculated log Pow is 5.0 which is outside the calibration area.

Description of key information

The partition coefficient n-octanol/water of the test substance was determined according to the "HPLC method" described in EG-Guideline 92/69/EEC A.8., following GLP.

The logPow was found to be > 4.7 (Pow > 50119), referred to log Pow of the standard fluoranthene. The calculated log Pow is 5.0 which is outside the calibration area.

Key value for chemical safety assessment

Log Kow (Log Pow):
5
at the temperature of:
40 °C

Additional information