Registration Dossier
Registration Dossier
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EC number: 419-720-5 | CAS number: 182061-89-8
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:
- guideline study
- Remarks:
- according to EU method C.3
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.3 (Algal Inhibition test)
- Version / remarks:
- Directive 92/69/EEC
- GLP compliance:
- yes
Test material
- Reference substance name:
- -
- EC Number:
- 419-720-5
- EC Name:
- -
- Cas Number:
- 182061-89-8
- Molecular formula:
- C25H26N9Na3O12S3
- IUPAC Name:
- trisodium 6-amino-5-{2-[4-({4-[bis(2-hydroxyethyl)amino]-6-[(2-sulfonatoethyl)amino]-1,3,5-triazin-2-yl}amino)-2-sulfonatophenyl]diazen-1-yl}-4-hydroxynaphthalene-2-sulfonate
Constituent 1
Sampling and analysis
- Analytical monitoring:
- not specified
Test organisms
- Test organisms (species):
- Scenedesmus sp.
Study design
- Test type:
- other: modified testing due to colouring of the test media
- Water media type:
- not specified
- Limit test:
- yes
Test conditions
- Nominal and measured concentrations:
- 100 mg/L nominal
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The test item was found not to inhibit the growth rate of the green alga Scenedesmus subspicatus after 72 hours. The NOEC-values of the test item for both inhibition of growth rate and inhibition of yield after 72 hours were = 100 mg/L, respectively. The EC50-values of the test item for both inhibition of growth rate and yield after 72 hours were > 100 mg/L, respectively.
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