Registration Dossier
Registration Dossier
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EC number: 208-008-8 | CAS number: 505-32-8
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:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Test method comparable to guideline study, in accordance with accepted German national standards.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 988
- Report date:
- 1988
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: German standard DIN 38412 part 9 (draft).
- GLP compliance:
- no
Test material
- Reference substance name:
- 3,7,11,15-tetramethylhexadec-1-en-3-ol
- EC Number:
- 208-008-8
- EC Name:
- 3,7,11,15-tetramethylhexadec-1-en-3-ol
- Cas Number:
- 505-32-8
- Molecular formula:
- C20H40O
- IUPAC Name:
- 3,7,11,15-tetramethylhexadec-1-en-3-ol
- Details on test material:
- - Name of test material (as cited in study report): 3,7,11,15-Tetramethyl-1-hexadecen-3-ol (Isophytol)
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)
- Method: a stock solution of 2 g/l was prepared. The test performed using Tween 80 as an emulsifier (0.01 - 100 mg/l)
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
- Test temperature:
- 21.6 °C
- Nominal and measured concentrations:
- Nominal test concentrations, made from 0.1, 1. 10, 100 and 1000 mg/l.
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 500 mg/L
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC10
- Effect conc.:
- > 500 mg/L
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC90
- Effect conc.:
- > 500 mg/L
- Basis for effect:
- growth rate
Any other information on results incl. tables
Results after 72 h were as follows:
Biomass:
EbC50 = >500 mg/l
EbC90 = >500 mg/l
Growth rate:
ErC50 = >500 mg/l
ErC90 = >500 mg/l
Applicant's summary and conclusion
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
