Registration Dossier
Registration Dossier
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EC number: 247-323-5 | CAS number: 25899-50-7
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The substance adsorbs on algae in test medium after 72 hours and undergoes a photo-transformation at the same time. Based on nominal concentrations, the toxicity of the test substance on algae growth rate was calculated as ErC50(72h) = 113.3 mg/L, NOErC(72h) = 10 mg/L and the associated LOErC(72h) = 32 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 113.3 mg/L
- EC10 or NOEC for freshwater algae:
- 10 mg/L
Additional information
One GLP study (Hoffmann, 2010) was extensively conducted. It revealed low algal toxicity; yet the substance happened to adsorb on algae in test medium after 72 hours, as well as to undergo a photo-transformation at the same time. Based on nominal concentrations, the toxicity of the test substance on algae growth rate was calculated as ErC50(72h) = 113.3 mg/L, NOErC(72h) = 10 mg/L and the associated LOErC(72h) = 32 mg/L. Other studies are available on algae (Herschke, 1983; Dupont, 2000). However, they are not considered reliable as very few details are available or no information are given concerning the potential care given to the volatile properties of the test substance.
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