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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
Study period:
May 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The method followed that described in the OECD Guidelines for Testing of Chemicals (2006) No 201, "Freshwater Alga and Cyanobacteria, Growth Inhibition Test" referenced as Method C.3 of Commission Regulation (EC) No 761/2009.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report Date:
2016

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Off white powder
Specific details on test material used for the study:
Batch 18108859

Results and discussion

Effect concentrationsopen allclose all
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 47 mg/L
Basis for effect:
growth rate
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
42 mg/L
Basis for effect:
other: Yield
Key result
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
15 mg/L
Basis for effect:
growth rate
Key result
Duration:
72 h
Dose descriptor:
LOEC
Effect conc.:
47 mg/L
Basis for effect:
growth rate

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
Analysis of the 10, 32 and 100 % v/v saturated solution test preparations at 0 hours showed measured test concentrations to range from 4.6 to 47 mg/L. There was no significant change in the measured concentrations at 72 hours and so the results are based on 0-Hour measured test concentrations only.
Exposure of Pseudokirchneriella subcapitata to the test item gave the following results based on 0-Hour measured test concentrations:
EC 50 (72 h ) : >47mg/l (growth rate) / 42 mg/L (yield)
NOEC 50 (72 h ) : 15mg/l (growth rate) / 4.6 mg/L (yield)
LOEC 50 (72 h ) : 4747mg/l (growth rate) / 15 mg/L (yield)