Registration Dossier
Registration Dossier
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EC number: 433-360-6 | CAS number: 34036-80-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Key study: Test method EEC C3, OECD 201. GLP study. After 72 hours of exposure, the EbC50 (biomass) and ErC50 (growth rate) respectively were 13.8 and 22.0 mg/l in green algae. The NOEC for both area under the growth curve and growth rate was 4.34 mg/l.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 22 mg/L
- EC10 or NOEC for freshwater algae:
- 4.34 mg/L
Additional information
Key study: The effect of the test item on the growth of the unicellular green alga Selenastrum capricornutum was assessed under non-axenic conditions. The study was conducted in accordance with EEC Methods C3 and OECD Guideline 201. Triplicate algal cultures, with an initial cell density of 1x10E+04/ml, were exposed to test item dissolved in algal nutrient medium at nominal concentrations of 6.25, 12.5, 25, 50 and 100 mgl/l for 72 hours. After 72 hours of exposure, the EbC50 (biomass) and ErC50 (growth rate) respectively were 13.8 and 22.0 mg/l in green algae. The NOEC for both area under the growth curve and growth rate was 4.34 mg/l.
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