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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 274-324-8 | CAS number: 70131-50-9
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The acute toxicity of bentonite acid leached to algae was assessed (OECD TG 201). EC50 > 100 mg/L (based on eluate)
Key value for chemical safety assessment
Additional information
As bentonite acid leached is poorly water-soluble, an eluate of 125 mg/L was made by shaking suspending bentonite in water, shaking for 24h and filtration. The eluate was used for the test after dilution to a concentration of 100 mg/L by addition of nutrient salts and the algae inoculum.
After 72h no inhibition of growh rate and no decrease in cell number in the eluate was observed. It can therefore be concluded that the EC50 is >100 mg/L.
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.
