Registration Dossier
Registration Dossier
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EC number: 217-006-6 | CAS number: 1719-57-9
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
No biodegradation expected for Chlor(chloromethyl)dimethylsilane (CAS No. 1719 -57 -9).
Key value for chemical safety assessment
Additional information
No data is available for Chlor(chloromethyl)dimethylsilane (CAS No. 1719 -57 -9). Chlor(chloromethyl)dimethylsilane
hydrolysis results in (chloromethyl)dimethylsilandiol and hydrochloric acid which is inorganic and will not be discussed. (chloromethyl)methoxydimethylsilane (CAS No. 18143-33-4) hydrolyses to the same silanol hydrolysis product (chloromethyl)methylsilanediol. The other hydrolysis products being methanol which is readily biodegradable. It is therefore considered valid to read-across the results for (chloromethyl)methoxydimethylsilane (CAS No. 18143-33-4) to fill the data gap for the registered substance and ignoring for the conclusion the contribution of methanol to the biodegradation. In the study 9 -10% biodegradation was observed in 28 days. The study was conducted according to OECD guideline 301F and is considered reliable (IBACON, 2002). This is selected as the key study. The study is considered to be reliability 1 (reliable without restrictions). Taking into account the contribution of methanol to the biodegradation no biodegradation can be expected forChlor(chloromethyl)dimethylsilane (CAS No. 1719 -57 -9).
This is further supported by the following overview on the wider group of chloralkylsilanes.
CAS |
Name |
Readily biodegradable? Yes/no |
Result: Biodegradation after 28 day |
Guideline |
Reliability |
Corrected % biodegradation once alkoxy/acetoxy biodegradation is accounted for |
002212-11-5 |
Silane, (chloromethyl)dimethoxymethyl- |
No |
30-34% |
OECD 301F |
1a |
-16 |
007787-93-1 |
Dichloro(3-chloropropyl)methylsilane |
No |
0% |
EC C4-C |
1a |
0 |
013501-76-3 |
(3-chloropropyl)diethoxymethylsilane |
No |
56% |
EC C4-A |
1a |
6 |
002530-87-2 |
3-chloropropyltrimethoxysilane |
No |
43% |
OECD 301 B |
1 |
-7 |
005089-70-3 |
(3-chloropropyl)triethoxysilane |
No |
46% |
EC C4-C |
1a |
-21 |
002344-80-1 |
Chloromethyltrimethylsilane |
No |
6% |
OECD 301D |
1a |
6 |
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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