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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)
Qualifier:
according to guideline
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
GLP compliance:
yes
Analytical monitoring:
yes
Vehicle:
yes
Test organisms (species):
Daphnia magna
Test type:
static
Water media type:
brackish water
Limit test:
yes
Total exposure duration:
48 h
Hardness:
2.502 mmol/L
Test temperature:
Room Temperature (20 ± 5 °C)
pH:
7.8
Dissolved oxygen:
8.0-8.9 mg/L
Nominal and measured concentrations:
100 / 180 / 320 / 560 / 1000 mg/L (first experiment)
22 / 46 / 100 / 220 / 460 / 1000 mg/L (second experiment)
Details on test conditions:
Treatments 100 / 180 / 320 / 560 / 1000 mg/L (first experiment)
22 / 46 / 100 / 220 / 460 / 1000 mg/L (second experiment)
Temperature 22.7 – 23.8 °C (first experiment)
20.5 – 21.5 °C (second experiment)
Duration 48 hours
Observation times 24 and 48 hours
Medium renewal none
Test vessel Closed glass flasks nominal volume 65 mL
Treatments 4 vessels, each completely filled with test solution and 5 daphnia
Blank control 4 vessels, each completely filled with dilution water and 5 daphnia
Reference substance (positive control):
yes
Remarks:
Potassium dichromate K2Cr2O7 (CAS No. 7778-50-9)
Key result
Duration:
24 h
Dose descriptor:
EC50
Effect conc.:
>= 13 - <= 24 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
>= 1.5 - <= 3.18 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Key result
Duration:
48 h
Dose descriptor:
NOEC
Effect conc.:
ca. 0.43 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Key result
Duration:
48 h
Dose descriptor:
LOEC
Effect conc.:
ca. 1.4 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Validity criteria fulfilled:
yes
Conclusions:
The following results were determined for the test item TERPENIC BASE (species: Daphnia magna).
48h-NOEC = 0.43 mg/L
48h-LOEC = 1.40 mg/L
48h-EC50 = 2.24 mg/L

Description of key information

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
2.24 mg/L

Additional information