Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 477-470-2 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance decomposes
Reference
Description of key information
Using KOWWIN v1.68 the logPow of several constituents of the test item which make together two thirds of the UVCB substance were calculated to be in the range of -3.35 to 0.66 at 25 °C. The highest value of 0.66 can be used as key value for chemical safety assessment.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 0.66
- at the temperature of:
- 25 °C
Additional information
In accordance with column 2 Annex VII section 7.8 of Regulation (EC) No 1907/2006 (REACH), the study does not need to be conducted as the test item decomposes in contact with water. Therefore, a QSAR estimation was performed. As the the substance is a UVCB without defined molecular structure, the logPow was calculated for the alkoxysiloxane (mono, di and tri) boundary structures with either only methoxy or ethoxy groups. These groups make up approximately two thirds of the UVCB substance. Using KOWWIN v1.68 the logPow of those constituents were calculated to be in the range of -3.35 to 0.66 at 25 °C.
Additionally, the logPow values of other constituents of the substance are reported in the respective disseminated ECHA dossier to be:
Dioctyltin oxide: EC number: 212-791-1 | CAS number: 870-08-6: QSAR: 9.26 at 20 °C
Methyl benzoate: EC number: 202-259-7 | CAS number: 93-58-3: 2.2 at 20 °C
Ethyl benzoate: EC number: 202-284-3 | CAS number: 93-89-0: 2.59 at 23 °C
Methanol: EC number: 200-659-6 | CAS number: 67-56-1: -0.77 at 20 °C
Ethanol: EC number: 200-578-6 | CAS number: 64-17-5: -0.35 at 20 °C
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
