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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 921-774-4 | CAS number: 13763-19-4
Endpoint summary
Administrative data
Description of key information
Additional information
Decachlorotetrasilane hydrolyses very rapidly to decahydroxytetrasilane and HCl. Further hydrolysis of the Si-Si bonds in decahydroxytetrasilane is expected to happen rapidly and produces monosilicic acid. At concentrations above about 100-150 mg/l (measured as SiO2 equivalents), condensation products of monosilicic acid can also form. At concentrations >100-150 mg/l of SiO2, monomeric monosilicic acid condenses into colloidal particles of polysilicic acid (silica sol) or a highly cross-linked network (silica gel). Decahydroxysilane is also likely to form condensation products (polyhydroxy-polysilanes) at similar concentrations (in terms of SiO2 equivalents).
These hydrolysis products are inorganic substances which enter natural biogeochemical cycles.
It is not appropriate to calculate Predicted Environmental Concentrations (PECs) for monosilicic acid. Refer to Section 9.0 of the CSR.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.
