Registration Dossier
Registration Dossier
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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 inorganic substance and not biodegradable. Therefore it is not relevant to speak about true biodegradation in the context of environmental hazard assessment of silica. Dissolved silica (as Si(OH)4) is still subject to biologically mediated processes leading to transformations of biologically absorbed silica. In biological processes Si is not known (reliable reported) to be associated covalently to organic molecules (Craig, 1986). Regarding the information requirements and testing, biodegradability testing is not relevant for this substance (ANNEX VII-X, sections Ready biodegradability, simulation tests in surface water, soil and sediments).
Craig P.J., (ed) 1986, Organometallic compounds in the environment, Wiley & Sons, NY
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