Registration Dossier
Registration Dossier
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EC number: 300-346-5 | CAS number: 93925-43-0
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
Reference
Description of key information
Key value for chemical safety assessment
Additional information
An experimental study according to OECD 121 is technically not
feasible. It was proved in experimental studies on physico-chemical
parameters (e.g. partition coefficient) that HPLC combined with UV or RI
detection is not suitable for the determination of the test substance.
The compound could not be detected and possibly did not elute from the
analytical column. Thus, no experimental study could be performed. Since
the substance is an organometallic compound (Q)SAR models are not
suitable to be used as well.
However, the substance is expected to hydrolyze quickly in contact with
water. Thus, the assessment of the hydrolysis products rather than the
parent substance was considered to be relevant. The expected hydrolysis
products are dioctyltin dichloride (DOTC), ethanol, acetic acid and
silicium dioxide. From research activities it is known that organotin
compounds have an affinity to bind to organic matter (e.g. sewage
sludge) by adsorption (RPA, 2005; Fent, 2013). For the expected main
hydrolysis product (DOTC) a log Koc of 5.47 is reported. Ethanol and
acetic acid are not expected to adsorb to organic matter based on their
low log Kow values (< 3; see IUCLID section 4.7).
Thus, adsorption of the organotin moiety of the substance to organic
matter cannot be excluded.
References
Fent, K. (2013): Ökotoxikologie. 4th Edition, Thieme.
RPA (2005): Risk assessment studies on targeted application of certain organotin compounds. Final report prepared for the European Commission.
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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