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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:
other information
Reliability:
2 (reliable with restrictions)

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
1981
Report Date:
1981
Reference Type:
other company data
Title:
Unnamed
Year:
1997
Report Date:
1997

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
Principles of method if other than guideline:
DIN 38412 Part 11

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Analytical purity: >99%

Test solutions

Details on test solutions:
- Stock solution: saturated solution prepared by stirring a batch in water at room temperature for 72h and filtrating it through a folded paper filter;
- Concentration of stock solution: 336 mg DOC/L, correspoinding to 781 mg/l 2-Chlorobenzal chloride;

Test organisms

Test organisms (species):
Daphnia magna

Study design

Test type:
static

Test conditions

Test temperature:
Roomtemperature
Nominal and measured concentrations:
Nominal concentrations: Dilution of the stock solution with 336 mg DOC/L, corresponding to 781 mg/l 2-Chlorobenzal chloride
Diluted from 1:100 corresponding to 7.81 mg/l test substance up to 1:1 nominal concetration.

Results and discussion

Effect concentrationsopen allclose all
Duration:
24 h
Dose descriptor:
EC0
Effect conc.:
78.2 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Duration:
24 h
Dose descriptor:
EC50
Effect conc.:
437 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Duration:
24 h
Dose descriptor:
EC100
Effect conc.:
> 782 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Details on results:
Confidence interval of EC50: 361.0 mg/L - 529.6 mg/L

Applicant's summary and conclusion

Conclusions:
With the indicated test data the EC50 of 2-Chlorobenzalchloride to Daphnia magna under the conditions of the test was estimated to be ca. 400 mg/l.