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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:
1 (reliable without restriction)
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
yes
Analytical monitoring:
yes
Vehicle:
no
Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Water media type:
brackish water
Limit test:
no
Total exposure duration:
72 h
Test temperature:
22.0 – 25.0 °C (Experiment I)
22.4 – 24.4 °C (Experiment II)
pH:
7.7-8.4
Nominal and measured concentrations:
1 / 3.2 / 10 / 32 / 100 mg/L nominal concentration
Reference substance (positive control):
yes
Remarks:
Potassium dichromate K2Cr2O7 (CAS No. 7778-50-9)
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
ca. 10 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
ca. 10 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
other: yield
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Validity criteria fulfilled:
yes

Description of key information

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
10 mg/L

Additional information