Registration Dossier
Registration Dossier
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EC number: 419-740-4 | CAS number: 137658-79-8 CGL 1545
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)
- Rationale for reliability incl. deficiencies:
- other: Test was conducted according to EU Method C.3 and compliant with GLP.
Data source
Reference
- Reference Type:
- other: Body responsible for the test
- Title:
- Unnamed
- Year:
- 1 996
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.3 (Algal Inhibition test)
- Deviations:
- not specified
- GLP compliance:
- yes
Test material
- Reference substance name:
- Phenol, 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2- ethylhexyl)oxy)-2-hydroxypropoxy)-
- IUPAC Name:
- Phenol, 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2- ethylhexyl)oxy)-2-hydroxypropoxy)-
- Reference substance name:
- 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2-ethylhexyl)oxy)-2-hydroxypropoxy)phenol
- EC Number:
- 419-740-4
- EC Name:
- 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-(3-((2-ethylhexyl)oxy)-2-hydroxypropoxy)phenol
- Cas Number:
- 137658-79-8
- Molecular formula:
- C36H45N3O4
- IUPAC Name:
- 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-{3-[(2-ethylhexyl)oxy]-2-hydroxypropoxy}phenol
Constituent 1
Constituent 2
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Study design
- Limit test:
- yes
- Total exposure duration:
- 72 h
Test conditions
- Hardness:
- 240 mg CaCO3/L
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 0.029 mg/L
- Nominal / measured:
- not specified
- Conc. based on:
- not specified
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 0.029 mg/L
- Nominal / measured:
- not specified
- Conc. based on:
- not specified
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- > 0.029 mg/L
- Nominal / measured:
- not specified
- Conc. based on:
- not specified
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- > 0.029 mg/L
- Nominal / measured:
- not specified
- Conc. based on:
- not specified
- Basis for effect:
- biomass
Any other information on results incl. tables
Because of the low solubility of the substance in water, a supersaturated suspension of 100 mg/L was made and filtered. The study was conducted using the undiluted filtrate. The measured concentration decreased by 0.037 mg/L in initially up to 0.022 mg/L at the end. The average measured concentration 0.029 mg/L was used for the “Observed-effect concentration”.
Applicant's summary and conclusion
- Conclusions:
- The substance can be classified as non-toxic to aquatic plants up to the limit of its solubility.
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