Registration Dossier
Registration Dossier
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EC number: 231-545-4 | CAS number: 7631-86-9
Bioaccumulation: terrestrial
Administrative data
Link to relevant study record(s)
Description of key information
Dissolved silica (i.e. monomeric or oligomeric silicic acid) can be actively assimilated by terrestrial
plants (e.g. grass). Particularly high concentrations of amorphous silica are found in rice, millet, sugarcane, and wheat plants (Rabovsky 1995, as cited in ATSDR draft document on silica, 2017).
Basically, amorphous silica is a naturally occurring substance. Silica and silicic acid (silicate) are found throughout the Earth’s lithosphere and the ocean contains a huge sink of them. The synthetic form (SAS) is of higher amorphous purity than the naturally occurring amorphous silica and does not contain contaminants. Once released and dissolved in the environment no distinction can be made between SAS and naturally occuring amorphous silica due to its chemical analogy in natural environmental processes (i.e. environmental fate and pathways).
Key value for chemical safety assessment
Additional information
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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