Registration Dossier
Registration Dossier
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EC number: 208-488-9 | CAS number: 530-62-1
Toxicity to aquatic algae and cyanobacteria
Administrative data
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- other: hydrolysis product
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
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: DIN38412 Part 9
- GLP compliance:
- no
Test material
- Reference substance name:
- Imidazole
- EC Number:
- 206-019-2
- EC Name:
- Imidazole
- Cas Number:
- 288-32-4
- Molecular formula:
- C3H4N2
- IUPAC Name:
- 1H-imidazole
- Details on test material:
- 99,8%
Constituent 1
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Study design
- Total exposure duration:
- 72 h
Results and discussion
Effect concentrations
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 133 mg/L
- Nominal / measured:
- nominal
- Basis for effect:
- growth rate
- Details on results:
- Unit: mg/l Analytical monitoring: no
NOEC: = 25
LOEC: = 50
EC10: = 63.7
EC50: = 133
Any other information on results incl. tables
The
effects are related to the nominal concentrations effect values based on
biomass:
EbC10 (72 h) = 58.7 mg/L
EbC10 (96 h) = 33.6 mg/L
EbC50 (72 h) = 126.8 mg/L
EbC50 (96 h) = 81.8 mg/L
NOEC (72 h) = 10.0 mg/L
LOEC (72 h) = 25.0 mg/L
effect values based on growth rate:
EuC10 (96 h) = 20.0 mg/L
EuC50 (96 h) = 129.6 mg/L
- pH values at test start (w/o algae) and after 96 h (inoculated assays):
concentration (mg/L) pH (0 h) pH (96 h)
control 7.84 7.92
5 7.87 7.97
10 7.86 7.98
25 7.87 7.99
50 7.91 8.01
100 8.00 8.05
250 8.17 8.24
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.
