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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Reference
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:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
Deviations:
no
GLP compliance:
yes
Analytical monitoring:
yes
Vehicle:
yes
Test organisms (species):
Daphnia magna
Test type:
semi-static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
48 h
Test temperature:
21-22 degrees Celcius
pH:
7.6-8.1
Dissolved oxygen:
8.6-9.0
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
>= 100 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
test mat.
Basis for effect:
mobility
Validity criteria fulfilled:
yes
Conclusions:
Exposure of Daphnia magna to the test item gave an EC50 of >100 mg/L based on the average fresh measured test concentrations.
Executive summary:

Introduction

A study was performed to assess the acute toxicity of the test item to Daphnia magna. The method followed was designed to be compatible with the OECD Guidelines for Testing of Chemicals (April 2004) No. 202, "Daphnia sp., Acute Immobilisation Test" referenced as Method C.2 of Commission Regulation (EC) No. 440/2008.

Results

Analysis of the fresh test preparations at 0 and 24 hours showed measured test concentrations to range from 4.6 to 89 mg/L. There was no significant change in the measured concentrations of the old or expired test solutions at 24 and 48 hours and so the results are based on the average fresh measured test concentrations only.

Exposure of Daphnia magna to the test item gave an EC50 of >100 mg/L based on the average fresh measured test concentrations.

Description of key information

Exposure of Daphnia magna to the test item gave an EC50 of >100 mg/L based on the average fresh measured test concentrations.

Key value for chemical safety assessment

Additional information