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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 280-445-7 | CAS number: 83411-71-6
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
NOEC (72 h, Pseudorkirchneriella subcapitata) = 50 (% of saturated solution) based on growth rate
EC50(72h, Pseudorkirchneriella subcapitata) > 100 (% of saturated solution) or maximum water solubility based on growth rate and yield
Key value for chemical safety assessment
Additional information
In a 72 hour acute toxicity study, the cultures of Pseudorkirchneriella subcapitata were exposed to the test material at active ingredient concentrations of 100 mg/l under static conditions in accordance with the OECD 201.
Based on the results of the range finding test, the definitive test was conducted with solutions preparated as dilutions of a saturated solution of test material (nominally 100 mg a.i./l). The exposure concentration were nominally 2.35, 12.5, 25, 50 and 100 % saturated, plus an untreated control. Analytical verification was not conducted during this study as it was not possible to develop a suitably sensitiveanalyticalmethod.
The 72h EC10, EC20 and EC50 values for average specific growth rate were estimated to be greater than the maximum solubility of the substance, under the conditions of the test.
The 72h EC10 and EC20 values for yield were estimated to be 44 % and 66 % satured solution, respectively. The 72h EC50 was estimated than the maximum solubility of the test material, under the conditions of the test.
The 72h NOEC for Growth rate was estimated to be 50 % satured solution, with the NOEC for yield being greater than the maximum solubility of test material
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.
