Registration Dossier
Registration Dossier
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EC number: 940-875-4 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 72-h acute toxicity of the test item to Pseudokirchneriella subcapitata was studied in a GLP study performed according to OECD TG 201 and EC Method C.3. The ErC50 (0-72h) was > 100 mg/L and the NOErC was 100 mg/L, based on nominal concentrations.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 100 mg/L
Additional information
One study is available. In this study, performed under GLP according to OECD TG 201 and EC Method C.3, Pseudokirchneriella subcapitata was exposed to an aqueous dispersion of the test item at concentrations of 1.0, 3.2, 10, 32 and 100 mg/L (three replicate flasks per concentration) for 72 hours, under constant illumination and shaking at a temperature of 24 ± 1 °C. Samples of the algal populations were removed daily and cell concentrations determined for each control and treatment group, using a haemocytometer and light microscope. Analysis of the 32 and 100 mg/L test preparations at 0, 24, 48 and 72 hours showed measured test concentrations to range from 88% to 103% of nominal and so the results are based on nominal test concentrations only. Exposure of Pseudokirchneriella subcapitata to the test item gave ErC50 (0 -72h) and EyC50 (0 -72h) values of greater than 100 mg/L. The No Observed Effect Concentration was 100 mg/L.
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