Registration Dossier
Registration Dossier
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EC number: 442-070-9 | CAS number: 329039-38-5
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
The results of the chemical safety assessment do not indicate the need to investigate further the effects of methyldiacetoxyisopropoxysilane to sediment organisms
Key value for chemical safety assessment
Additional information
No experimental data concerning the toxicity of methyldiacetoxyisopropoxysilane (CAS No. 329039-38-5) to sediment organisms are available. According to the standard requirements set in Regulation (EC) No. 1907/2006, Annexes VII and VIII information regarding the effects of the substance on sediment organisms does not need to be presented at this tonnage band (100-1000 t/y). Furthermore, the Guidance on information requirements and chemical safety assessment, R.7B (ECHA, 2008) states that in general, substances with log Kow or Koc ≤ 3 are not likely to be adsorbed to sediment. According to the Integrated Testing Strategy (ITS) for toxicity to sediment organisms (present in the above mentioned Guidance) no testing on sediment organisms is necessary if the substance is not highly adsorptive or binding behavior to sediment particles is not expected (methyldiacetoxyisopropoxysilane (CAS No. 329039-38-5) and its hydrolysis products, log Kow values < 3). The environmental exposure assessment performed for this substance (see CSR attached to IUCLID section 13) shows that the Risk Characterization Ratio (i.e. PEC/PNEC ratio) in the sediment compartment is < 1 and therefore, under the current exposure conditions, methyldiacetoxyisopropoxysilane (CAS No. 329039-38-5) does not pose a risk to sediment organisms and further testing is not deemed necessary according to Regulation (EC) No. 1907/2006, Annex XI, section 3.
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