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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
Study period:
2003
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2003

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
Version / remarks:
and Directive CEE - Method C2
GLP compliance:
yes (incl. QA statement)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
STRAUS-clone 5

Study design

Test type:
semi-static
Total exposure duration:
48 h
Post exposure observation period:
observations at 0, 24 and 48h.

Test conditions

Hardness:
Reconstituted (M4) water.
255 mg CaCO3 / L.
Test temperature:
18.8-20.2°C
pH:
7.68 to 8.21
Dissolved oxygen:
maintained at >60% of air saturation
Nominal and measured concentrations:
See table below in the window "Any other information on materials and methods inc. tables."
Details on test conditions:
Determination of the number of immobilized daphnids in the test solutions.
Reference substance (positive control):
no

Results and discussion

Effect concentrations
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
>= 26.2 mg/L
Nominal / measured:
meas. (geom. mean)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks:
number of immobilized daphnia
Results with reference substance (positive control):
Not applicable.
Reported statistics and error estimates:
Not applicable.

Applicant's summary and conclusion

Conclusions:
The 48-h EC50 of thiofestermet for Daphnia magna in a static system is >26.2mg/L.
Not classified.

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