Registration Dossier
Registration Dossier
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EC number: 467-100-8 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance decomposes
Reference
Description of key information
Triethoxysilyl-(1,3-dimethylbutylidene)propylamine hydrolysis very fast into ethanol and the (1,3-dimethylbutylidene)propylamine-silanol. The determination of the partitions coefficient is technically not feasible with Triethoxysilyl-(1,3-dimethylbutylidene)propylamine and the endpoint is waived.
The average half-lives for the hydrolysis of alkoxysilanes are very short:
Hydrolysis of alkoxysilanes is both acid and base-catalyzed (Osterholtz
and Pohl, 1992; Mill and Tse, 1989). Rates are slowest near pH7.
Experimental hydrolysis half-lives for various alkoxysilanes are as
follows (25 deg C)(Osterholtz and Pohl, 1992; Mill and Tse, 1989):
pH4: 1.1 to 24 min
pH5: 13 to 155 min
pH7: 28 to 504 min
pH9: 0.04 to 340 min
A theoretical partition coefficient of Triethoxysilyl-(1,3-dimethylbutylidene)propylamine was predicted by QSAR according to EPI Suite 4.11 (KOWWIN v. 1.68) and the data are used as supporting data (Log Kow = 5.19).
Key value for chemical safety assessment
Additional information
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