Registration Dossier

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2009

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
Version / remarks:
2004
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
All concentration levels and the control were analysed via GC after 0h and 24 h (new media) and after 24h and 48h (old media). Recovery rates in all concentration levels were in the range of 86-100% in the new media and in the range of 55-75% in the old media.

Test solutions

Vehicle:
no
Details on test solutions:
A stock solution (10 mg/l) was prepared by weighing the tests substance and dilution with dilution water. The solution was agitated.

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
The test organisms were bred at the testing facility in M4 medium at 20°C with 16h illumination. Test organims were 2-24h old and were not fed during the study.

Study design

Test type:
semi-static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
48 h

Test conditions

Test temperature:
19-20°C
pH:
7.6-7.8 after 48h
Dissolved oxygen:
7.7-7.8 after 48h
Nominal and measured concentrations:
nominal: 0.125, 0.250, 0.500, 1.00 and 2.00 mg/l
geometric mean measured concentration: 0.092, 0.193, 0.394, 0.807 and 1.74 mg/l
Reference substance (positive control):
yes
Remarks:
Potassium dichromate

Results and discussion

Effect concentrationsopen allclose all
Duration:
24 h
Dose descriptor:
EC10
Effect conc.:
0.397 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
48 h
Dose descriptor:
EC10
Effect conc.:
0.312 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
24 h
Dose descriptor:
EC50
Effect conc.:
0.661 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
0.431 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
24 h
Dose descriptor:
EC100
Effect conc.:
1.74 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
48 h
Dose descriptor:
EC100
Effect conc.:
0.807 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
48 h
Dose descriptor:
NOEC
Effect conc.:
0.193 mg/L
Nominal / measured:
meas. (geom. mean)
Duration:
48 h
Dose descriptor:
LOEC
Effect conc.:
0.394 mg/L
Nominal / measured:
meas. (geom. mean)
Results with reference substance (positive control):
EC 50 (24h): 1.64 mg/l
Reported statistics and error estimates:
EC values were calculated by sigmoidal dose-response regression.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes