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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
short-term toxicity to fish
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study according EU/OECD guideline.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.1 (Acute Toxicity for Fish)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
3-methoxy-4-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one
EC Number:
619-590-1
Cas Number:
135302-13-5
Molecular formula:
C4H7N3O2
IUPAC Name:
3-methoxy-4-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Danio rerio (previous name: Brachydanio rerio)

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
96 h

Results and discussion

Effect concentrationsopen allclose all
Duration:
2 h
Dose descriptor:
LC0
Effect conc.:
>= 102.6 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
test mat.
Basis for effect:
mortality (fish)
Duration:
24 h
Dose descriptor:
LC0
Effect conc.:
>= 102.6 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
test mat.
Basis for effect:
mortality (fish)
Duration:
48 h
Dose descriptor:
LC0
Effect conc.:
>= 102.6 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
test mat.
Basis for effect:
mortality (fish)
Duration:
72 h
Dose descriptor:
LC0
Effect conc.:
>= 100 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
test mat.
Basis for effect:
mortality (fish)
Duration:
96 h
Dose descriptor:
LC0
Effect conc.:
>= 100 mg/L
Nominal / measured:
meas. (arithm. mean)
Conc. based on:
test mat.
Basis for effect:
mortality (fish)

Any other information on results incl. tables

Sublethal observations / clinical signs:

The test substance did not show any effects under the conditions of this test.

The LC0 is > 100 mg/L.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Executive summary:

The test substance did not show any effects under the conditions of this test.

The LC0 is > 100 mg/L.