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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Reference
Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
yes
Analytical monitoring:
yes
Test organisms (species):
Pseudokirchneriella subcapitata (previous names: Raphidocelis subcapitata, Selenastrum capricornutum)
Test type:
static
Limit test:
no
Key result
Duration:
72 h
Dose descriptor:
EC10
Effect conc.:
0.055 mg/L
Nominal / measured:
meas. (geom. mean)
Conc. based on:
test mat.
Basis for effect:
growth rate
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 0.282 mg/L
Nominal / measured:
meas. (geom. mean)
Conc. based on:
test mat.
Basis for effect:
growth rate
Validity criteria fulfilled:
yes
Conclusions:

The EC10 for specific growth rate was 0.055 mg/L based on measured concentrations.
The EC50 for specific growth rate was >0.282 mg/L.
Range finding tests indicated that the result for the EC50 would be between 0.282 and 0.71 mg/L.
Executive summary:

The EC10 for specific growth rate was 0.055 mg/L based on measured concentrations.

The EC50 for specific growth rate was >0.282 mg/L.

Range finding tests indicated that the result for the EC50 would be between 0.282 and 0.71 mg/L.

Description of key information

The EC10 for specific growth rate was 0.055 mg/L based on measured concentrations.

The EC50 for specific growth rate was >0.282 mg/L.

Range finding tests indicated that the result for the EC50 would be between 0.282 and 0.71 mg/L.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.282 mg/L
EC10 or NOEC for freshwater algae:
0.055 mg/L

Additional information