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EC number: 231-130-8
CAS number: 7440-21-3
Silicon, primarily in the form of silica and silicates (the
transformation forms of elemental silicon) is taken up by living
species. Silicic acid is known to be the major bioavailable form for
aquatic organisms and it plays an important role in the biogeochemical
cycle of Si. Most living organisms contain at least trace quantities of
silicon. For some species Si is essential element taken up actively,
while for others Si is not essential but still taken passively and need
to be excreted out (or passivated by way or other). Many species like
diatom algae, radiolarians, flagellates, sponges and gastropods have
silicate skeletal structures.
Silica is very ubiquitous in the aquatic and terrestrial
environments. Measured silicon concentration values in biota are
available for a variety of systems. These observations have shown no
tendency or low intrinsic tendency of dissolved or undissolved silica to
bioaccumulate in aquatic or terrestrial species if silicon is not taken
up actively. Sufficient evidence exists to show that no further
bioaccumulation studies are needed for silicon.
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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