Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 211-656-4 | CAS number: 681-84-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
(72-hour) EC50: >22 mg/l inhibition of growth rate and biomass Pseudokirchneriella subcapitata, reliability 2 (read-across from CAS 78-10-4)
NOEC: ≥22 mg/l inhibition of growth rate and biomass Pseudokirchneriella subcapitata, reliability 2 (read-across from CAS 78-10-4)
Key value for chemical safety assessment
Additional information
There are no reliable data for the substance. However a 72-hour EC50 value of >22 mg/l and a NOEC of ≥22 mg/l have been determined for the effects of the structurally analogous substance, tetraethyl orthosilicate (CAS 78-10-4),on growth rate and biomass of Pseudokirchneriella subcapitata based on geometric mean measured concentrations. The corresponding values expressed relative to nominal concentrations were >100 mg/l and ≥100 mg/l respectively. It is likely that the test organisms were exposed to the hydrolysis products of the substance.
This read-across study is considered to be reliability 1 (reliable without restrictions); however the read across of the results is considered to be reliability 2 (reliable with restrictions)
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.
