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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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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:
other: GLP guideline study without restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014

Materials and methods

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

Test material

Constituent 1
Chemical structure
Reference substance name:
2-chlorobenzaldehyde
EC Number:
201-956-3
EC Name:
2-chlorobenzaldehyde
Cas Number:
89-98-5
Molecular formula:
C7H5ClO
IUPAC Name:
2-chlorobenzaldehyde
Details on test material:
- Name of test material (as cited in study report): o-chlorobenzaldehyde
- Physical state: liquid
- Analytical purity: 99.42 %
-

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
TEST ORGANISM
- Common name: water flea
- Source: Standard laboratory culture maintained in the Institute of Industrial Organic Chemistry, Branch Pszczyna, Department of Ecotoxicology, Laboratory of Aquatic Toxicology [SOP/W/67]
- Age at study initiation (mean and range, SD): < 24 hours
- Method of breeding: Daphnia magna was cultured in glass beakers of 150 mL volume (one parent per vessel) at room temperature 18 – 22o C with the light : dark ratio of 16 h : 8 h (electronic time programmer, KANLUX, Poland). The culture was maintained in Elendt M7 medium [SOP/W/63, SOP/W/67].
- Feeding during test: none

ACCLIMATION
- Acclimation conditions (same as test or not): yes
- Type and amount of food: Pseudokirchneriella subcapitata algae suspension. Group B vitamins and micronutrients necessary for proper growth were supplied with lyophilized Spirulina sp. suspension.

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
48 h

Test conditions

Test temperature:
21.1 – 22.6 ºC
Nominal and measured concentrations:
Nominal test item concentrations: 100, 50, 25, 12.5, 6.25, 3.13, 1.56 and 0.78 mg/L plus the control
In 24-hour old solutions the determined concentration of the test item was in the range of 19.2 – 93.0% of nominal concentration
Details on test conditions:
TEST SYSTEM
- Test vessel: glass beakers
- Type (delete if not applicable): covered with transparent lids in order to minimize evaporation and to prevent accidental contamination
- Material, size, headspace, fill volume: 150 mL
- Aeration: none
- No. of organisms per vessel: 5
- No. of vessels per concentration (replicates): 4
- No. of vessels per control (replicates): 4

OTHER TEST CONDITIONS
- Adjustment of pH: none
- Photoperiod: 16:8 light:dark

TEST CONCENTRATIONS
- Spacing factor for test concentrations:
- Justification for using less concentrations than requested by guideline:
- Range finding study
- Test concentrations:
- Results used to determine the conditions for the definitive study:
Reference substance (positive control):
yes
Remarks:
potassium dichromate

Results and discussion

Effect concentrations
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
7.33 mg/L
Nominal / measured:
meas. (geom. mean)
Conc. based on:
test mat.
Basis for effect:
mobility

Applicant's summary and conclusion

Validity criteria fulfilled:
yes

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