Registration Dossier

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:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1993
Report date:
1993

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: EPA FIFRA Subdivison J. Guideline 123-2 Groth and reproduction of aquatic plants
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
EPTC
EC Number:
212-073-8
EC Name:
EPTC
Cas Number:
759-94-4
Molecular formula:
C9H19NOS
IUPAC Name:
N,N-dipropyl(ethylsulfanyl)formamide

Test organisms

Test organisms (species):
Lemna gibba

Study design

Test type:
semi-static
Water media type:
freshwater
Total exposure duration:
14 d

Test conditions

Test temperature:
25+-1 C
Nominal and measured concentrations:
Culture medium control: nominal concentrations: 0.01, 0.032, 0.1, 0.32, 1, 3.2, 10, 32 mg/l

Results and discussion

Effect concentrationsopen allclose all
Duration:
96 h
Dose descriptor:
NOEC
Effect conc.:
ca. 0.89 mg/L
Basis for effect:
growth rate
Remarks on result:
other: P=0.05
Duration:
96 h
Dose descriptor:
other: ErC50
Effect conc.:
ca. 7 mg/L
Basis for effect:
growth rate

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
NOEC: 0.89mg/l
ErC50: 7mg/l
Executive summary:

NOEC: 0.89mg/l

ErC50: 7mg/l