Registration Dossier
Registration Dossier
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EC number: 205-476-5 | CAS number: 141-27-5
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:
- other: The study was performed according to German national test guidelines. The solvent was not constant within all test concentrations.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 989
- Report date:
- 1989
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: DIN 38412 L9
- GLP compliance:
- no
Test material
- Reference substance name:
- Citral
- EC Number:
- 226-394-6
- EC Name:
- Citral
- Cas Number:
- 5392-40-5
- IUPAC Name:
- 3,7-dimethylocta-2,6-dienal
- Details on test material:
- - Name of test material (as cited in study report): Citral N (3,7-Dimethyl-2,6-octadien-l-al)
- Lot/batch No.: B2490 from 11.04.88
Purity: No data
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test solutions
- Vehicle:
- yes
- Details on test solutions:
- PREPARATION AND APPLICATION OF TEST SOLUTION (especially for difficult test substances)
- Chemical name of vehicle (organic solvent, emulsifier or dispersant): Cremophor
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 72 h
Test conditions
- Nominal and measured concentrations:
- Nominal test concentrations:
0.5, 1.0, 2.5, 5.0, 10.0, 25.0, control, solvent control
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC10
- Effect conc.:
- 3 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 103.8 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
Any other information on results incl. tables
EC values after 72 hours (in mg/l):
EbC10: 4.9 (95%-confidence intervals: 1.8 - 13.3)
EbC50: 16.1 (95%-confidence intervals: 3.7 - 71.0)
ErC10: 3.0 (95%-confidence intervals: 2.0 - 4.6)
ErC50: 103.8 (95%-confidence intervals: 33.8 - 318.9)
EC values after 96 hours (in mg/l):
EbC10: 1.9 (95%-confidence intervals: 1.4 - 2.4)
EbC50: 18.9 (95%-confidence intervals: 13.0 - 27.4)
ErC10: 8.9 (95%-confidence intervals: 3.2 - 25.1)
ErC50: 103.8 (95%-confidence intervals: 4.9 - 117.4)
Applicant's summary and conclusion
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