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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:
2006-06-22 to 2006-09-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Given the extremely high water solubility of DIGIRENA SA TEMABF4 anhydrous, it was anticipated that the log10Pow value would be very low and that practical determination of this parameter would not be feasible.
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2005-06-09
Type of method:
flask method
Analytical method:
other: no data
Type:
log Pow
Partition coefficient:
< -3.3
Remarks on result:
other: no data for pH and temperature were stated

The n-octanol solubility was determined to be less than 1 g/L. The water solubility was determined in an other test to be greater than 2000 g/L.

These values yielded an estimated Pow value (n-octanol solubility / water solubility) of less than 5 x 10-4 (equivalent log10Pow < -3.3). This value is well below that which can routinely be determined by available methods (the shake-flask and HPLC methods generally cover the ranges of log10Pow values from -2 to 4 and 0 to 6 respectively).

Conclusions:
DIGIRENA SA TEMABF4 anhydrous was estimated to have a log10Pow value of less than –3.3.

Description of key information

DIGIRENA SA TEMABF4 anhydrous was estimated to have a log10Pow value of less than –3.3.

Key value for chemical safety assessment

Additional information