Registration Dossier

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Currently viewing:

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:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Specific details on test material used for the study:
Purity: 99.53%
Appearance: yellow to slight yellow clear liquid
Storage conditions: cool, dry place, protected from fire.

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
As test system Daphnia magna Straus (Cladocera, Crustacea) was employed in the assay, as described by the guideline OECD 202:2004. The animals were less than 24 hours old at the start of the test, and they were not first brood progeny. They derived from Daphnia magna ephippia, supplied by the qualified provider ECOTOX LDS. Ephippia are a quiescent form of animals which can be hatched when needed.
The vials with the ephippia were stored in the refrigerator at 5 °C ± 2 °C; they were provided with a quality control certificate which reported the test species, the batch number, the expiration date, the storage and hatching conditions, the expected hatching, and the EC50 - 24 h value for K2Cr2O7. As internal quality control, EC50 value was determined for the batch of ephippia used in the test, and reported in the control chart Mod. 775/GxP.

Study design

Test type:
static
Total exposure duration:
48 h

Test conditions

pH:
7.4-7.9
Reference substance (positive control):
yes

Results and discussion

Effect concentrations
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
17.583 mg/L

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
Under these conditions, the EC50 for the test substance Estragole, batch n° 20161212 resulted 17.583 mg/l.