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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1995
Report Date:
1995

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method C.3 (Algal Inhibition test)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPP 122-2 (Algal Toxicity, Tiers I and II)
Deviations:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent

Test organisms

Test organisms (species):
Pseudokirchneriella subcapitata (previous names: Raphidocelis subcapitata, Selenastrum capricornutum)

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
120 h

Test conditions

Reference substance (positive control):
no

Results and discussion

Effect concentrationsopen allclose all
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
0.313 - 0.625 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Remarks on result:
other:
Duration:
120 h
Dose descriptor:
EC50
Effect conc.:
0.156 - 0.625 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
0.313 - 0.625 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
0.156 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
not specified

Applicant's summary and conclusion

Validity criteria fulfilled:
yes