Registration Dossier
Registration Dossier
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EC number: 944-073-5 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
Log Pow = < 0.3
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 0.3
- at the temperature of:
- 25 °C
Additional information
Partition coefficient was determined by OECD Guideline 117 (Partition Coefficient (n-octanol/water), HPLC Method).
The study was performed using a HPLC with a C18 column. Due to the fact that the retention time of peak 1 and 2 lay below the retention time of thiourea (log Pow is not calculable) and the calculated log Pow of peak 3 was lower than the lowest log Pow of the reference substances (2-Butanone with log Pow 0.3), the log Pow of these peaks is stated as < 0.3.
As peak 3 and 4 showed a relative area < 5 %, these peaks were considered as minor peaks and are not taken into account in the determination of log Pow of the test substance. Although area is not necessarily correlated to absolute concentration if a UV detector is used, it is assumed that the test substance consists mainly of peaks 1 and 2. The log Pow of the test substance is therefore stated as < 0.3.
An evaluation of the hydrofilicity and lipofilicity of the substance can be done. The solubility in water is really high (> 1000 g/L) therefore it can be assumed that the substance is hydrofilic and no lipofilic. Hence this low log Pow can be a realistic value (log Pow <0.3).
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