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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 273-761-1 | CAS number: 69012-64-2 Amorphous silicon dioxide particles from the volatilization and vaporization of furnace feed materials in the manufacture of ferrosilicon and silicon.
Endpoint summary
Administrative data
Description of key information
Additional information
Silica fume is stabile oxidised inorganic substance which may undergo transformation processes in the environment. Abiotic (non-biological) degradation can typically occur by physico-chemical processes such as hydrolysis. Photodegradation of silica is not an important fate process. The speciation of dissolved silica may be different (ionic) if the environmental conditions change to highly alkaline. In highly saturated aquatic solutions dissolved silica starts to form dimers, trimers and may form polymerised silica colloids.
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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