Registration Dossier
Registration Dossier
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EC number: 910-245-3 | CAS number: -
Toxicity to terrestrial arthropods
Administrative data
Link to relevant study record(s)
Description of key information
No harmful effects
Key value for chemical safety assessment
Additional information
This substance is a multi-constituent substance consisting of sodium hydroxide (215-185-5, 1310-73-2) and disodium metasilicate (229-912-9, 6834-92-0). It is the by-product of a reaction between zircon (EC no 239-019-6) and sodium hydroxide; after hydrolysis, this substance is the water-soluble fraction. In accordance with column 2 of REACH Annex IX, toxicity testing with terrestrial organisms depends on the outcome of the chemical safety assessment using PNECs derived based on equilibrium partitioning. Based on data for silicic acid, potassium salt, 215-199-1 silicates do not elicit any environmentally relevant adverse response in aquatic organisms and so, for this substance, no PNEC was derived for the aquatic compartment. As a result no PNEC could be derived for the terrestrial compartment. Based on this, no chemical safety assessment needs to be performed for the reaction mass of disodium metasilicate and sodium hydroxide. Therefore, no refinement of the hazard assessment is required and hence no toxicity testing with terrestrial organisms is needed (short-term (Annex IX) or long-term (Annex X)).
The above should be considered as an expert statement to waive the requirement for actual testing for long-term toxicity to terrestrial arthropods under REACH Annex IX for endpoint 9.4.4.
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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