Registration Dossier
Registration Dossier
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EC number: 921-774-4 | CAS number: 13763-19-4
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
No measured data are available for decachlorotetrasilane.
Decachlorotetrasilane contains no chromophores that would absorb visible or UV radiation, so direct photolysis is not likely to be significant. Decachlorotetrasilane hydrolyses very rapidly to decahydroxytetrasilane and HCl. Therefore, reaction with water vapour, rather than photolysis, is expected to be the primary degradation process in air. The Si-Si bonds may also react to produce monosilicic acid. At concentrations above about 100-150 mg/l (measured as SiO2 equivalents), condensation products of monosilicic acid ((poly)silicic acid) and decahydroxytetrasilane can form.
These hydrolysis products are inorganic substances which enter natural biogeochemical cycles.
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