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Partition coefficient

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Reference
Endpoint:
partition coefficient
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Study period:
04/2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.8 (Partition Coefficient)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
estimation method (solubility ratio)
Partition coefficient type:
octanol-water
Type:
log Pow
Partition coefficient:
< -4.9
Temp.:
20 °C
pH:
7
Remarks on result:
other:
Remarks:
As the value was calculated no values for pH or temperature were determined. Thus, standard conditions can be assumed.

Solubility of the substance in 1-octanol: < 2mg/L

Solubility of the substance in demineralized water: > 143000 mg/L

These concentrations of the substance were used to calculate the partition coefficient (n-octanol / water) as log Pow.

Pow of the substance: < 2mg/L / > 143000 mg/L = < 0.00001399

For partition coefficient of the substance follows: log Pow = < -4.9

Conclusions:
Calculated with the octanol solubility and the water solubility the logPow of the substance was < -4.9.
Executive summary:

To calculate the partition coefficient, solubility tests of the substance in 1-octanol and in demineralized water were prepared. The result of the tests show, that the test item was < 2 mg/L soluble in 1-octanol and > 143000 mg/L in demineralised water.

These concentrations of the substance were used to calculate the partition coefficient (n-octanol / water) as log Pow.

Pow of the substance: < 2mg/L / > 143000 mg/L = < 0.00001399

For partition coefficient of the substance follows: log Pow = < -4.9

Description of key information

Calculated with the octanol solubility and the water solubility the logPow of the substance was < -4.9.

Key value for chemical safety assessment

Log Kow (Log Pow):
-4.9
at the temperature of:
20 °C

Additional information

"should read: <-4.9 at 20°C"

To calculate the partition coefficient, solubility tests of the substance in 1-octanol and in demineralized water were prepared. The result of the tests show, that the test item was < 2 mg/L soluble in 1-octanol and > 143000 mg/L in demineralised water.

These concentrations of the substance were used to calculate the partition coefficient (n-octanol / water) as log Pow.

Pow of the substance: < 2mg/L / > 143000 mg/L = < 0.00001399

For partition coefficient of the substance follows: log Pow = < -4.9