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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:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report date:
2012

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 221 (Lemna sp. Growth Inhibition Test)
Version / remarks:
C.26.
Deviations:
no
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
orange powder

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
yes

Test organisms

Test organisms (species):
Lemna minor

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
7 d

Test conditions

Reference substance (positive control):
yes

Results and discussion

Effect concentrations
Duration:
7 d
Dose descriptor:
EC50
Effect conc.:
> 100 mg/L
Nominal / measured:
nominal
Basis for effect:
growth rate

Any other information on results incl. tables

With the five concentrations tested between 100 mg/L and 9.5 mg/L only a minor effect on the growth of Lemma plants was observed. With the highest concentration of 100 mg/L for the frond area a significant inhibition of the groth rate of 4.7 % occured.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
With 100 mg/L the growth rate of frond area was significantly inhibited by 4.7 %.
Therefore the NOEC for the frond area was determined with 55.6 mg/L and LOEC was 100 mg/L.
For the growth rate of frond number NOEC is >= 100 mg/L and LOEC is > 100 mg/L.