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EC number: 911-238-8 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
One calculation by a standard QSAR method and two experimentally determined partition coefficients for related substances (rosin and rosin, hydrogenated) indicate that the partition coefficient of Resin 835 A is >6.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 6.5
- at the temperature of:
- 25 °C
Additional information
The logPow of Resin 835A is high if the substance is in the undissociated state. The dissociation constant was calculated to 5.1, see section 4.21, so that at environmentally relevant pH in the neutral range the sparingly dissoluted substance will be in the dissociated state, which would result in a much lower logPow.
The test item is a UVCB substance.
A partition coeffcient n-Octanol/water of 6.45 to 6.55 was calculated by a standard QSAR method. The experimentally determined partition coefficient for the chemically closely related substance Rosin (CAS 8050-09-7) was between 3.0 and 6.2 and it was between 1.9 and 7.7 when the pH was adjusted to 2. For Rosin, hydrogenated (CAS 65997-06-0) a partition coefficient of 2.3 to 8.3 was determined experimentally and between 2.5 and 7.6 when the pH was adjusted to 2. For read-across see "Assessment Reports: Justification for read-across (RA-A)."Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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