Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 233-042-5 | CAS number: 10025-78-2
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 is inorganic
Reference
Description of key information
log Kow [trichlorosilane]: Not relevant due to the substance being inorganic and also hydrolysing very rapidly in contact with water
log Kow [Silanetriol]: not relevant for inorganics
log Kow [Silicic acid]: not relevant for inorganics
Key value for chemical safety assessment
Additional information
In accordance with Column 2 of REACH Annex VII, the partition coefficient study does not need to be conducted as trichlorosilane and its hydrolysis products are inorganic.
In addition, trichlorosilane reacts very rapidly in contact with water, generating silanetriol and hydrochloric acid. Silanetriol reacts further to give monosilicic acid, which condenses at concentrations above approximately 150 -150 mg/L as SiO2 to give insoluble amorphous polysilicic acid.
log Kow is not relevant for inorganic compounds such as silanetriol and silicic acid.
The purpose of the log Kow study is to understand the interaction of the substance with water and octanol, which acts as a model for lipids in humans and organisms and for organic carbon in soils and sediments. On the basis of structure and supported by predictions, monosilicic acid and silanetriol have a high affinity with water and low affinity for lipids and organic carbon.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
