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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-585-2 | CAS number: 108-46-3
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Data are available in an OECD guideline study under GLP conditions.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 97 mg/L
- EC10 or NOEC for freshwater algae:
- 97 mg/L
Additional information
In an OECD TG 201 study, algae (Pseudokirchneriello subcapitata) were exposed for 72 hours to mean measured concentrations of 3.0, 5.8, 12, 24, 47 and 97 mg/L (Springborn Smithers, 2006, RL= 1). The 72 hr EbC50 and ErC50 values (biomass and growth rate) were both greater than the highest mean measured dose tested (>97 mg/L). The mean measured NOEC for growth inhibition based on the biomass endpoint was considered to be 47 mg/L and 97 mg/L for the growth rate endpoint.
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.
