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Ecotoxicological information

Toxicity to aquatic plants other than algae

Administrative data

Endpoint:
toxicity to aquatic plants other than algae
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Literature not available (MIGRATED DATA SET)

Data source

Reference
Reference Type:
publication
Title:
not stated
Author:
Cowgill, U.M. et al.,
Year:
1991
Bibliographic source:
Research Journal WPCF 63 (7), 991-998

Materials and methods

Principles of method if other than guideline:
other: Not available
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Chlorobenzene
EC Number:
203-628-5
EC Name:
Chlorobenzene
Cas Number:
108-90-7
Molecular formula:
C6H5Cl
IUPAC Name:
chlorobenzene
Test material form:
liquid
Details on test material:
- Name of test material (as cited in study report): chlorobenzene
- Analytical purity: No data

Test organisms

Test organisms (species):
other: Lemna gibba and Lemna minor
Details on test organisms:
Several clones

Study design

Test type:
not specified
Water media type:
freshwater
Limit test:
no
Total exposure duration:
7 d

Test conditions

Hardness:
636 mg CaCO3/L
Test temperature:
25.0 +/- 0.7 °C
pH:
4.9 +/- 0.2
Details on test conditions:
Light: 5382 +/- 89 lux
Alkalinity: 23 mg CaCO3/L
S: 65.1 mg/L
Note: Closures covered with parafilm to avoid loss by evaporation

Results and discussion

Effect concentrations
Duration:
7 d
Dose descriptor:
NOEC
Effect conc.:
294 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
frond number
Remarks on result:
other: for all clones
Details on results:
Results related to number of plants and fronds and dry weight (7d mean values)

Any other information on results incl. tables

7d-NOEL = 294 mg/L for all clones

7d-EC 50 result for each clone:

Lemna gibba G-3, 593 mg/L

Lemna minor 6591, 545 mg/L

Lemna minor 7101, 412 mg/L

Lemna minor 7102, 390 mg/L

Lemna minor 7136, 353 mg/L

Applicant's summary and conclusion

Executive summary:

Several clones of Lemna gibba and Lemna minor were tested during 7d. The NOEL obtained was 294 mg/L and the EC50 values were in hte range of 353-593 mg/L; literature not available.