Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 212-039-2
CAS number: 753-73-1
A single reliable study investigating the hydrolysis of the dimethyltin
dichloride (DMTC) has been found to be available. In
that study, which was conducted according to OECD Guideline 111, the
percentage hydrolysis of DMTC was less than 10% after incubation in
buffer solutions pH 4.0, pH 7.0 and pH 9.0 and in Milli-Q water, for 5
days at 50 °C. A secondary reference (Bertolo (2001)) was discovered
however it has not been possible to obtain the full report. That report
that makes note that whilst the dimethyltin substance is hydrolytically
stable, the substance itself is not. Given that the
full study has not been reviewed this information is regarded as
supporting. Therefore, based on the result of the key study, DMTC was
considered hydrolytically stable and no further testing was performed.
The ready biodegradability of DMTC was investigated in line with OECD
Guideline 301F using oxygen consumption as the test criterion. The test
was extended to 35 days because the plateau phase had not been reached
after 28 days of incubation. DMTC was not degraded. Consequently, the
60% degradation criterion was not met and therefore it was considered
not readily biodegradable under the specific conditions of this test.
Further biotic degradation tests on DMTC were considered unnecessary.
The substance is considered to be of no immediate concern to the
environment and the available data were found to be adequate both for
classification and labelling purposes and for PBT assessment.
Adaptations from the standard data requirements were submitted to
address the individual endpoints.
No high quality data that addressed the substance's bioaccumulation
potential were available and the existing studies were summarised only
for the sake of completeness. These suggested that the BCF of the
substance may range from 1.6 to 50. Given that the substance is reported
to have a high water solubility (823 g/L at 20 °C) coupled with a very
low octanol-water partition coefficient (log Kow: -2.18) and that no
significant environmental exposure is expected it was considered
justified to waive further testing to investigate this endpoint.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again