Registration Dossier
Registration Dossier
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EC number: 202-051-6 | CAS number: 91-22-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The lowest EC50 on algae is 66 mg/L based on growth rate. The same level of toxicity is seen in freshwater and seawater algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 66 mg/L
- EC50 for marine water algae:
- 73.7 mg/L
- EC10 or NOEC for freshwater algae:
- 30 mg/L
Additional information
Based on a weight of evidence approach made on 4 studies, the ECr50(72 h) varies between 66 and >100 mg/L, no difference is seen between freshwater and marine water algae.
The lowest NOECr obtained in these studies is 30 mg/L.
One study with a validity 4, shows a lowest EC50 (0.26 mg/L) but its validity can not be properly evaluated due to lack of information.
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