Registration Dossier
Registration Dossier
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EC number: 231-545-4 | CAS number: 7631-86-9
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to terrestrial plants: long-term
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Reference
Description of key information
In accordance with Annex XI, 1.2 and 1.5, of REACH Regulation 1907/2006 the study requirement is waived based on the natural abundance of silica and silicates as minerals in soil.
Plants may take up silica in form of silicic acid, which is the bioavailable form of silica. In plants, monomeric silicic acid may polymerize and form amorphous silica particles through condensation reactions. Amorphous silica accumulates in rice, millet, sugarcane, and wheat plants (Rabovsky 1995, as cited in ATSDR draft document on silica, 2017).
Increased germination rates and reduced time to germination have been reported in various plant species after treatment of seeds with nano-sized silica. Only at very high doses, pH effects and/or adsorption of macro- and micronutrients may lead to phytotoxic effects.
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.
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.
