Registration Dossier
Registration Dossier
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EC number: 939-728-7 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The substance exhibits an ErC50 for freshwater algae of 2.726 mg/L and an EC10 of 0.939 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 2.73 mg/L
- EC10 or NOEC for freshwater algae:
- 0.939 mg/L
Additional information
One reliable study is available for the registered substance. The toxicity to aquatic algae was studied according to OECD TG No. 201 and Test Method C.3 from Commission Regulation (EC) No. 440/2008. Algae cultures (Pseudokirchneriella subcapitata) were exposed to substance at nominal test concentrations of 0.2, 0.4, 1.0, 2.1, 4.6 and 10 mg/L over a test period of 72 hours (static test). Concentrations were analytically verified at the start and daily until the end of the test. Measured concentrations deviated more than 20% of the initial concentrations. Thus, the endpoints were based on measured concentration (geometric mean). Based on the average measured exposure concentrations in the biotic test and under the experimental conditions, the 72 -hour EC50 for growth rate was determined to 2.726 mg/L and the 72 -hour EC10 to 0.939 mg/L.
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