Registration Dossier
Registration Dossier
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EC number: 203-628-5 | CAS number: 108-90-7
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:
- 1 991
- 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
- 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
Constituent 1
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.
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