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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:
Experiment start date - 16 February 2005; Experiment completion date - 18 February 2005; Study completion date - 19 April 2005.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.8 (Partition Coefficient)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
calculation method (fragments)
Partition coefficient type:
octanol-water
Specific details on test material used for the study:
Identity: FAT 40819/A
Description: Red brown powder
Batch number: Red ROE 420 BOP 01/04
Purity: approx. 77 %
Stability of test item: Stable under storage condition
Expiry date: 02 November 2009
Storage conditions: At room temperature.
Analytical method:
high-performance liquid chromatography
Type:
log Pow
Partition coefficient:
< -5.5
Remarks on result:
other: Calculated value
Details on results:
Neither the HPLC-method according to OECD Guideline No. 117 nor the flask-shaking method according to OECD Guideline No. 107 were applicable for the determination of the partition coefficient of FAT 40819/A. Thus, the log Pow-value for the test item was estimated from its solubility in n-octanol and in water, respectively. In the present study, the n-octanol solubility of FAT 40'819/A was determined to be < 3.346 µg/mL. The water solubility of FAT 40819/A was found to be >339.7 g/L at room temperature.
Conclusions:
The calculated partition coefficient of the test substance between n-octanol and aqueous phase is: log Pow = <-5.5
Executive summary:

In a GLP-compliant study, performed according to OECD guideline 117 and 107, the partition coefficient of the test substance between n-octanol and aqueous phase was determined. Neither the HPLC-method nor the flask-shaking method were applicable for the determination of the partition coefficient of the test substance. Thus, the log Pow-value for the test item was estimated from its solubility in n-octanol and in water. The calculated partition coefficient of the test substance between n-octanol and aqueous phase is: log Pow = <-5.5

Description of key information

In a GLP-compliant study, performed according to OECD guideline 117 and 107, the partition coefficient of the test substance between n-octanol and aqueous phase was determined (RCC 2005). Neither the HPLC-method nor the flask-shaking method were applicable for the determination of the partition coefficient of the test substance. Thus, the log Pow-value for the test item was estimated from its solubility in n-octanol and in water, respectively. The calculated partition coefficient of the test substance between n-octanol and aqueous phase is: log Pow -5.5

Key value for chemical safety assessment

Log Kow (Log Pow):
-1

Additional information