Registration Dossier
Registration Dossier
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EC number: 200-070-4 | CAS number: 50-89-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The effect on algal growth using the unicellular green alga Pseudokirchneriella subcapitata (Selenastrum capricornutum) was assessed over an exposure period of 72 hours according to EU Method C.3, OECD Guideline 201 (Alga, Growth Inhibition Test) and OPPTS 850.5400. In a limit test Algae were exposed to 100 mg/L (limit concentration) for 72 hours over several algal generations.
The measured test item concentration remained within ± 20 % of the nominal over the test period. Statistical analysis showed that that the 0-72 h average specific growth rate and yield in the treatment group (100 mg/L) was not statistically significantly different from the untreated concurrent control. The No Observed Effect Concentration (NOEC) was determined to be 100 mg/L. As the test item had no significant effect on the growth of algae therefore statistical analysis was not performed to determine the EC values. The 72-h EC50 values based on growth rate and yield were determined to be > 100 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 100 mg/L
- EC10 or NOEC for freshwater algae:
- 100 mg/L
Additional information
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