Registration Dossier
Registration Dossier
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EC number: 402-810-3 | CAS number: 17980-47-1 DYNASILAN BH N; DYNASILAN BSM 100 N; DYNASILAN NH 42
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Adsorption/desorption: Log Koc values for the parent substance: 4.0 (KOCWIN MCI prediction method); 2.9 (TGD non-hydrophobics Kow prediction method).
The results are considered to be reliable. Environmental exposure assessment will be carried out using each value, to assess the impact of any uncertainty in the predictions.
Key value for chemical safety assessment
Additional information
Adsorption has been estimated using two separate estimation methodologies: (1) KOCWIN (version 2) estimation using first-order Molecular Connectivity Index (MCI) and (2) estimation based on log Kow using TGD (Technical Guidance Document) non-hydrophobics equation. Kocpredictions based on log Kow and on MCI are both presented as neither method had been validated fully for this class of substance. The significance of the uncertainty in the Koc values predicted will be examined in the exposure assessment for this substance.
Triethoxyisobutylsilane hydrolyses in contact with water to the corresponding silanol and ethanol,which have low log Kow values (<3) and thus have low potential for adsorption. Therefore, in accordance with Column 2 of REACH Annex VIII, the adsorption/desorption screening test does not need to be conducted for the silanol hydrolysis products.
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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