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EC number: 231-130-8
CAS number: 7440-21-3
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
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.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.
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