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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 425-400-6 | CAS number: 179986-09-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
With high probability not harmful to aquatic algae.
Key value for chemical safety assessment
Additional information
The substance was tested as WAFs for its influence on the growth of the green alga Desmodesmus subspicatus over a period of 72 hours (RCC 1996). The study was performed according to the OECD Guideline No. 201 and GLP requirements.
This study examined three WAFs with loadings of 100, 33 and 10 mg/L, and an untreated control. Because of the large number of components present in the test article, no complete quantitative analysis could be performed. Instead, a HPLC profile of the UV-absorbing components was done in a separate study.
No inhibition of algae growth with respect to biomass and growth rate in the untreated control was observed at loadings of 10 and 33 mg/l. At the 100-mg/l loading, 75.6 % growth inhibition with respect to biomass, and 27.3 % growth inhibition with respect to growth rate were noted; moreover, both were statistically significantly inhibited when evaluated by Dunnett's test. Based on these observations and expressed as loading concentrations, after 72 hours of exposure the NOEC with respect to biomass and growth rate was 33 mg/L, respectively. The ErC50 (growth rate) was >100 mg/L, the EbC50 (biomass) was estimated by linear regression to be 69 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.
