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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
2008

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method C.3 (Algal Inhibition test)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
4-chlorobenzoic acid
EC Number:
200-805-9
EC Name:
4-chlorobenzoic acid
Cas Number:
74-11-3
Molecular formula:
C7H5ClO2
IUPAC Name:
4-chlorobenzoic acid
Test material form:
solid

Test organisms

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

Test conditions

Reference substance (positive control):
not specified

Results and discussion

Effect concentrationsopen allclose all
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
6.42 mg/L
Conc. based on:
test mat.
Basis for effect:
biomass
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
17.29 mg/L
Conc. based on:
test mat.
Basis for effect:
growth rate

Applicant's summary and conclusion

Executive summary:

In a closed system algal toxicity test, the toxicity of benzoic acid and its derivatives on Pseudokirchneriella subcapitata was determined.

Median effective concentration values are 6.42 mg/l (EC50, final yield) and 17.29 mg/l (EC50, growth rate) for 4-chlorobenzoic acid.