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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:
To be completed
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to other study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
EU Method A.8 (Partition Coefficient - Shake Flask Method)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
estimation method (solubility ratio)
Partition coefficient type:
octanol-water
Specific details on test material used for the study:
- Test item: REACH substance = freeze-dried commercial product
- Analytical purity: 97.2%
- Purity test date: 08 March 2017
- Lot:bacth No.: WI6G16X07 after drying
- Expiration date of the lot/batch: 16 July 2018
- Appearance: Off-white to yellow crystals
- Storage: At room temperature
Type:
Pow
Partition coefficient:
401.2
Remarks on result:
other: estimation method
Remarks:
ratio of the solubility in n-octanol and of the CMC
Key result
Type:
log Pow
Partition coefficient:
2.6
Remarks on result:
other: estimation method

The Pow, calculated as the quotient of the n-octanol- and CMC, is 401.2. It corresponds with a log Powvalue of 2.6.

Conclusions:
The n-octanol/water partition coefficient Pow of the test item was 401.2 (log Pow = 2.6) based on the ratio of its solubility in n-octanol (587 g/L) and of its CMC (1463 mg/L).
Executive summary:

The n-octanol/water partition coefficient Pow of the test item (= REACH substance) was determined in a GLP-compliant study performed in accordance with EC A.8 method and OECD Guideline No. 107, using the estimation method. The log Pow of the test item was 2.6 based on the ratio of its solubility in n-octanol (587 g/L) and of its CMC (1463 mg/L).

Description of key information

The n-octanol/water partition coefficient Pow of the test item (= REACH substance) was determined in a GLP-compliant study performed in accordance with EC A.8 method and OECD Guideline No. 107, using the estimation method. The log Pow of the test item was 2.6 based on the ratio of its solubility in n-octanol (587 g/L) and of its CMC (1463 mg/L).

Key value for chemical safety assessment

Log Kow (Log Pow):
2.6

Additional information

The n-octanol/water partition coefficient Pow of the test item was determined in one GLP-compliant study performed in accordance with standard methods, without deviations. The study is considered as reliable (Klimisch 1) and is selected as a key study for the endpoint.w