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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Administrative data

Endpoint:
toxicity to aquatic plants other than algae
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1999
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: A reliable and scientifically sound publication referring to a read-across substance.

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1999

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: ASTM Standards, E 1415- 91, Vol 11.05.
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Specific details on test material used for the study:
Mixture of sodium trifluoroacetate and [14C]trifluoroacetic acid
- Analytical purity: pure substance

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Lemna gibba
Details on test organisms:
TEST ORGANISM
- Common name: duckweed
- Source (laboratory, culture collection): cultures orginating from University of Waterloo, Canada

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
168 h

Test conditions

Test temperature:
23-25°C
Nominal and measured concentrations:
0, 19, 38, 75, 150, 300, 600, 1.200, and 2.400 mg/L (nominal)

Results and discussion

Effect concentrationsopen allclose all
Duration:
168 h
Dose descriptor:
EC50
Effect conc.:
1 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Duration:
168 h
Dose descriptor:
NOEC
Effect conc.:
300 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass

Applicant's summary and conclusion