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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:
effects on growth of green algae
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2021

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
466-070-3
EC Name:
-
Cas Number:
209995-38-0
Molecular formula:
C8H5F3O2
IUPAC Name:
2-(2,4,5-trifluorophenyl)acetic acid

Test organisms

Test organisms (species):
Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)

Study design

Test type:
static
Total exposure duration:
72 h

Test conditions

pH:
- 50 mg/l: pH 6.90

- 100 mg/l: pH 5.42

- 200 mg/l: pH 4.33

- 300 mg/l: pH 3.92

- 500 mg/l: pH 3.62
Nominal and measured concentrations:
50, 100, 200, 300, 500 mg/L.

Results and discussion

Effect concentrationsopen allclose all
Key result
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
50 mg/L
Nominal / measured:
not specified
Conc. based on:
test mat.
Key result
Duration:
72 h
Dose descriptor:
LOEC
Effect conc.:
100 mg/L
Nominal / measured:
not specified
Conc. based on:
test mat.
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
148 mg/L
Nominal / measured:
not specified
Conc. based on:
test mat.

Applicant's summary and conclusion

Conclusions:
EC50-72h > 148 mg/l
NOEC-72h = 50 mg/l
LOEC-72h = 100 mg/l