Registration Dossier
Registration Dossier
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EC number: 231-130-8 | CAS number: 7440-21-3
Endpoint summary
Administrative data
Description of key information
Additional information
Silicon is inorganic substance and element which may undergo transformation processes in the environment. The speciation of the substance may be different if the environmental conditions change. Abiotic (non-biological) transformation of silicon can typically occur by physico-chemical processes such as oxidation and hydrolysis.
A thin layer of amorphous silicon dioxide (SiO2) is formed on the surface of silicon exposed to air, even at ambient temperatures. The surface composition of high grade silicon (Si 99.1 wt%) consists of oxidized silicon. The oxidised layer on the surface passivates silicon and makes handling of silicon safer. Non passivated silicon powder is highly reactive.
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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