Registration Dossier
Registration Dossier
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EC number: 500-425-6 | CAS number: 159034-91-0 1 - 6.5 moles ethoxylated
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The Log Pow measured of this complex reaction product are ranged from 1.05 to 4.08. 75.1% of the components of this UVCB have Log Pow ranged from 1.05 to 1.86.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 1.86
- at the temperature of:
- 20 °C
Additional information
To appraise the octanol/water partition coefficient of this complex reaction product, this endpoint was experimentally measured in accordance with OECD testing guideline 117 and GLP requirements.
A range of octanol/water partition coefficient log values at pH 6.44 was obtained: 1.05 to 4.08. 75.1% of the components of this UVCB have Log Pow ranged from 1.05 to 1.86.
The chromatogram obtained by HPLC showed two groups of peaks. A first one gathered two close peaks (Log Pow: 1.05 and 1.86) representing more than 75% of the total area under the curve. The second appeared clearly later and gathered a broad group of components with Log Pow between 3.02 and 4.08 and represented less than 15% of all the complex reaction product.
The first group representing the most abundant components of this complex reaction product (>>10%), the highest log value (1.86) in this range was used for chemical safety assessment (CSA). The highest value was considered as a worst-case value, increase of n-octanol/water partition coefficient value leading to a significant increase of Predicted Environmental Concentration in sediments and soil.
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