Registration Dossier

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: made according to GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1995
Report Date:
1995

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Deviations:
no
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Appearance: yellow solidified melt
- Purity: 99.7 %
- Stability under test conditions: stable

Test solutions

Details on test solutions:
Tests concentrations: 0.032, 0.056, 0.1, 0.18, 0.32, 0.56 and 1.0 mg/l

Test organisms

Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Details on test organisms:
Strain: 86.81 SAG

Study design

Limit test:
yes
Total exposure duration:
72 h

Test conditions

Test temperature:
24 - 26 ºC
Details on test conditions:
- Medium: OECD algae medium
- Light intensity and quality: constantly illuminated with a light intensity of 150 μE.m-2.s-1 temperated water bath with constant motion of 100 cycles/min.

Results and discussion

Effect concentrationsopen allclose all
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
0.392 mg/L
Nominal / measured:
nominal
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
0.151 mg/L
Nominal / measured:
nominal
Basis for effect:
biomass
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
0.067 mg/L

Applicant's summary and conclusion