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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Link to relevant study record(s)

Reference
Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
yes
Analytical monitoring:
not specified
Vehicle:
not specified
Details on test solutions:
Identity and concentration of auxiliary solvent for dispersal: 1 % ODB-2 solution in 1 % Tween 80-acetone was dispensed at 10 myl to 100 ml algal suspension (1 mg/ml nominal test concentration)
1 % ODB-2 solution in 1 % Tween 80-acetone was dispensed at 10 ml to 100 ml algal suspension (1mg/ml nominal test concentration).
Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Details on test organisms:
Strain No. CCAP 276/20
Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
72 h
Reference substance (positive control):
not specified
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 0.76 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 0.76 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
>= 0.76 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
>= 0.76 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Validity criteria fulfilled:
yes
Conclusions:
The short-term EC50 of algae is beyond 0.76 mg/L.

Description of key information

The short-term EC50 of algae is beyond 0.76 mg/L.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.76 mg/L
EC10 or NOEC for freshwater algae:
0.76 mg/L

Additional information