Registration Dossier
Registration Dossier
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EC number: 203-678-8 | CAS number: 109-53-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The substance is acutely harmful to algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 47.5 mg/L
- EC10 or NOEC for freshwater algae:
- 27.5 mg/L
Additional information
The effect on the green algae Desmodesmus subspicatus was tested according to OECD TG 201 and under GLP (BASF AG, 2004; report no. 60E0186/033033). The test meets the validity criteria of OECD TG 201. The test vessels were sealed and filled without headspace to avoid loss of the substance during the exposure. The test concentrations were analytically monitored. The initial test concentrations deviated more than 20% from the nominal values; therefore, the effect values are based on the mean measured concentrations. The data were re-evaluated using ToxRat v3.3.0 (BASF AG, 2022). The obtained 72-h ErC50 was 47.5 mg/L, the 72-h ErC10 was 27.5 mg/L (measured).
It can be concluded that the substance is acutely harmful to algae.
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