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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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:
2000
Report date:
2000

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Qualifier:
according to guideline
Guideline:
EU Method C.3 (Algal Inhibition test)

Test material

Constituent 1
Test material form:
solid

Test organisms

Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)

Study design

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

Results and discussion

Effect concentrationsopen allclose all
Duration:
72 h
Dose descriptor:
EC10
Effect conc.:
6.6 mg/L
95% CI:
5.4 - 9.7
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
other:
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
EC10
Effect conc.:
3.1 mg/L
95% CI:
1.9 - 4.1
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
other:
Basis for effect:
biomass
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
10 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
other:
Basis for effect:
biomass
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 6 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
other:
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
1.7 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
other:
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
1.7 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
other:
Basis for effect:
biomass

Applicant's summary and conclusion

Validity criteria fulfilled:
yes