Registration Dossier
Registration Dossier
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EC number: 233-054-0 | CAS number: 10026-04-7
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 [silicon tetrachloride]: Not relevant, substance is inorganic and also reacts very rapidly in contact with water
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 silicon tetrachloride and its hydrolysis products, silicic acid and hydrochloric acid are inorganic.
In addition, silicon tetrachloride reacts very rapidly in contact with water, generating monosilicic acid and hydrochloric acid. Monosilicic acid condenses at concentrations above approximately 100-150 mg/L as SiO2 to give insoluble amorphous polysilicic acid.
log Kow is not relevant for inorganic compounds such as 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 has a high affinity with water and low affinity for lipids and organic carbon. A log Kow value of -4 was determined for monosilicic acid using a QSAR estimation method. The method has not been validated for inorganic substances but gives an indication of very low log Kow.
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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