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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:
2005
Report Date:
2005

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
ISO 8692 (Water Quality - Fresh Water Algal Growth Inhibition Test with Scenedesmus subspicatus and Selenastrum capricornutum)
Deviations:
no
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

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:
72 h

Test conditions

Reference substance (positive control):
yes

Results and discussion

Effect concentrationsopen allclose all
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
25.1 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
cell number
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
23.3 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
cell number
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
8 145 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
growth rate
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
1 343 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
growth rate
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
EC10
Effect conc.:
6.22 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
growth rate
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
EC10
Effect conc.:
7.07 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
growth rate
Remarks on result:
other:
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
2.2 mg/L
Nominal / measured:
nominal
Conc. based on:
other:
Basis for effect:
growth rate

Applicant's summary and conclusion

Validity criteria fulfilled:
yes