Registration Dossier
Registration Dossier
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EC number: 270-335-7 | CAS number: 68425-15-0
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The Log Pow of polysulfides, di-tert-dodecyl is > 12
Key value for chemical safety assessment
Additional information
Gancet (2008) followed OECD guideline 117 and refers to a high performance liquid chromatography method.
Polysulfides, di-tert-dodecyl is made of 2 units of tert-dodecanethiol linked by polysulfide bonds. Taking into account figure R.7.8-2 from theGuidance on Information Requirements and Chemical Safety Assessment,we can consider that the two substances share structural properties and that information on environmental fate and effects of tert-dodecanethiol is valuable for the assessment of Polysulfides, di-tert-dodecyl.
Both tert-dodecanethiol and Polysulfides, di-tert-dodecyl octanol partition coefficient results exceed the capacity range of OCDE 117 HPLC method. The highest standard for calibration of the column (DDT) has a logKow = 6.2. The peak corresponding to the substance have a retention time much larger than this (>16 minutes vs 9.2 minutes).
KOWWIN calculates a logKow = 12.4553 for Polysulfides, di-tert-dodecyl, with the default structure linked to the CAS number 68425-15-0. A more ramified structure gives close results, whatever the number of sulphur atoms between the two tert-dodecanethiol units is, as they do not contribute in the hydrophobicity.
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