Registration Dossier
Registration Dossier
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EC number: 213-928-8 | CAS number: 1067-33-0
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
Annex VII of the regulation (EC) No 1907/2006 column 2 (specific rules for adaptation from column 1) point 7.8 states
“If the test cannot be performed (e.g. the substance decomposes, has a high surface activity, reacts violently during the performance of the test or does not dissolve in water or in octanol, or it is not
possible to obtain a sufficiently pure substance), a calculated value for log P as well as
details of the calculation method shall be provided.”
As the water solubility of the substance is low and organotin compounds are problematic in the performance of analytical procedures. A calculation of the log P is not feasible as calculation methods such as EPIWIN are not validated for organometallic substances.
A study was performed on dibutyltin di(acetate to determine the partition coefficient of the substance, however, the partition coefficient was calculated using the erroneous results of an experimentally derived water solubility.
BNT Chemicals (2010) Partition coefficient of Dibutyltindiacetate. Testing laboratory: BNT Chemicals GmbH, Parsevalstraβe 29, 06749 Bitterfeld. Report No.: BNT 5146-1. Report date: 2010-06-16
The study was performed to EU Method A.8, though the study was assigned a reliability score of 3 (not reliable) due to deficiencies in the water solubilities used to calculate the partition coefficient.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 3.39
- at the temperature of:
- 20 °C
Additional information
The study, BNT, (2010) was provided as a supporting study and assigned a reliability score of 2. The study was conducted in-house to recognised guidelines, however only summary reports were provided with minimal information on methods and results.
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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