Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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.