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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
Study period:
2021-07-27 to 2021-10-14
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Analytical monitoring:
yes
Details on sampling:
Sampling schedule: Control at 72h, Test concentrations at 0.88 mg/l, 9.4 mg/l and 100 mg/l at 0 hours and 72 hours.
Vehicle:
no
Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Details on test organisms:
Strain No. 86.81 SAG
Test type:
semi-static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
72 h
Hardness:
22.5 mg/l CaCO3
Test temperature:
21-24 °C
pH:
8.2
Nominal and measured concentrations:
0.88, 1.9, 4.3, 9.4, 21, 45 und 100 mg/l
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
153 mg/L
Nominal / measured:
meas. (initial)
Conc. based on:
test mat.
Basis for effect:
growth rate
Validity criteria fulfilled:
yes
Conclusions:
The EC50 value based on growth rate was determined to be 27 mg/l based on measured concentrations.
Executive summary:

The EC50 value based on growth rate was determined to be 27 mg/l based on measured concentrations.

Description of key information

The EC50 value based on growth rate was determined to be 27 mg/l based on measured concentrations.

Key value for chemical safety assessment

EC50 for freshwater algae:
27 mg/L

Additional information