Registration Dossier
Registration Dossier
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EC number: 285-206-0 | CAS number: 85049-36-1
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:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Alga, Growth Inhibition Test)
- GLP compliance:
- yes
Test material
- Reference substance name:
- Fatty acids, C16-18 and C18-unsatd., Et esters
- EC Number:
- 285-206-0
- EC Name:
- Fatty acids, C16-18 and C18-unsatd., Et esters
- Cas Number:
- 85049-36-1
- Molecular formula:
- UVCB substance, not univocal molecular formula available
- IUPAC Name:
- UVCB substance, no IUPAC name available
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
- Details on sampling:
- Liquid/Liquid extraction with dichloromethan
Test solutions
- Vehicle:
- yes
- Details on test solutions:
- 5 mg/L with ethanol as vehicule
Test organisms
- Test organisms (species):
- Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)
- Details on test organisms:
- BREEDING CONDITIONS:
- culture in lab
- Temperature : 23 °C +/- 2 °C
- Brightness : continuous between 6000 and 10000 Lux
- Breeding environment
Study design
- Test type:
- semi-static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
Test conditions
- Test temperature:
- 23 °C +/- 2 °C
- pH:
- 8.1 +/- 0.2
- Details on test conditions:
- cintinuous light
- Reference substance (positive control):
- yes
- Remarks:
- Potassium dichromate
Results and discussion
Effect concentrations
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 282 µg/L
- Nominal / measured:
- meas. (geom. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Results with reference substance (positive control):
- 1.36 mg/L
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Fatty acid ethyl ester is non toxic to algea at solubility limit.
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