Registration Dossier

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Adequacy of study:
other information

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Annex V C3
GLP compliance:
yes

Test solutions

Details on test solutions:
Identity and concentration of auxiliary solvent for dispersal: Test solutions were stirred for 73 hours with short periods of ultrasonication prior to addition of the algal inoculum.

Test organisms

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

Study design

Limit test:
yes
Total exposure duration:
72 h

Results and discussion

Details on results:
% Concentration loss over test: 46

Any other information on results incl. tables

No significant inhibiton was observed

72 hour EbC50   > limit of solubility
72 hour ErC50   > limit of solubility
NOEC (biomass)  > limit of solubility
NOEC (growth)   > limit of solubility

Water hardness = Standard test medium used

The analytical results indicate that the test concentration
of BEM 4522 used in this study was at, or close to, the
limit of solubility.  Measured concentrations in the
centrifuged samples were 0.067 and <0.036 mg/l at 0 and 72
hours.

Mean measured concentrations in non-centrifuged samples were
9.3mg/l at 0h and 2.7mg/l at 72h.

Applicant's summary and conclusion