Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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: 690-526-2 | CAS number: 38632-47-2
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Scenedesmus subspicatus was exposed under static conditions to a range of concentrations of the water solution as test item (pH 6.1-7.2). After 48 h EC 50-values of > 100 mg/l for the active ingredient and the drying residue were (geometric mean measured concentrations) were measured. A NOEC of 0.065 mg/l for the active ingredient and of 0.071 mg/l for the drying residue were determined.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 0.065 mg/L
Additional information
The study data were analysed on a 48 h basis, because concentrations of the test item markedly decreased over time and thus the 48 h value reflects exposure better than the 72 h values. As cell numbers increased well above 16-fold over 48 h, and all other validity criteria are met. This is an option explicitly covered by OECD TG 201 (2006) and EU method C.3 (2009).
As the substance was analytically analyzed and the effect concentrations were calculated on the basis of the active ingredient the study with the water solution as test substance can also be used for the toxicity of the pure, solid substance.
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.
