Registration Dossier
Registration Dossier
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EC number: 204-514-8 | CAS number: 122-00-9
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The substance was moderately toxic to freshwater algae in an acute study over a period of 72 hours (ErC50 = 36 mg/L).
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 36 mg/L
- EC10 or NOEC for freshwater algae:
- 2.7 mg/L
Additional information
The acute toxicity of the substance 4'-methylacetophenone was studied under GLP using static conditions according to OECD TG 201. It was found that the substance inhibited the growth rate of the algae to a significant extent at a nominal concentration of 100 mg/L. The geometric mean of the measured concentration over 72 hours was 90.4 mg/L. The effect levels were determined on the basis of the geometric means of measured concentrations, resulting in a 72-hour EC50 value of 36 mg/L and a NOEC of 2.7 mg/L based on the inhibition of the algal growth rate.
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