Registration Dossier

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study summary

Data source

Reference
Reference Type:
review article or handbook
Title:
I U C L I D D a t a s e t Substance ID: 74869–22–0
Author:
EUROPEAN COMMISSION – European Chemicals Bureau
Year:
1987
Bibliographic source:
I U C L I D D a t a s e t Substance ID: 74869–22–0 pag 33

Materials and methods

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

Test material

Reference
Name:
Unnamed
Type:
Constituent

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
not specified

Test organisms

Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)

Study design

Test type:
not specified
Water media type:
not specified
Limit test:
yes
Total exposure duration:
96 h

Results and discussion

Effect concentrationsopen allclose all
Duration:
96 h
Dose descriptor:
EL50
Effect conc.:
> 1 000 mg/L
Nominal / measured:
not specified
Conc. based on:
not specified
Basis for effect:
biomass
Duration:
96 h
Dose descriptor:
EL50
Effect conc.:
> 1 000 mg/L
Nominal / measured:
not specified
Conc. based on:
not specified
Basis for effect:
growth rate

Any other information on results incl. tables

Results showed that neither the growth rate, nor the biomass of the algae were affected by the presence of the base oil WAF over the 96–hour exposure period i.e. the EL50 (96h biomass), EL50 (96h growth rate) and the NOEL (No Observed Effect Loading Rate) were all greater than 1000 mg/l.

Applicant's summary and conclusion