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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study according to EU/OECD guideline

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Sampling and analysis

Analytical monitoring:
yes

Test organisms

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

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
72 h

Results and discussion

Any other information on results incl. tables

Test conditions met all validity criteria, given by the mentioned guideline(s). The analytical finding of the test substance in the treatment level found on day 0 was 103 % of nominal. On day 3 analytical finding of 102 % of nominal was found. All results are based on nominal test concentrations of the metabolite. The static 72 hour algae growth inhibition test provided the following effects:

nominal concentration [mg p.m./L] / cell number after 72 h (means) per mL / (0-72h)-average specific growth rates [days-1]

control                                                        483 000                                              1.292                                                            

solvent control                                            479 000                                               1.289

pooled controls                                           481 000                                              1.291

10.0                                                            449 000                                              1.269

Conclusions: The (0 - 72h)-ErC50 for the test item is > 10.0 mg p.m./L

Applicant's summary and conclusion

Validity criteria fulfilled:
yes