Registration Dossier
Registration Dossier
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EC number: 284-854-1 | CAS number: 84988-66-9 Extractives and their physically modified derivatives such as tinctures, concretes, absolutes, essential oils, oleoresins, terpenes, terpene-free fractions, distillates, residues, etc., obtained from Lawsonia inermis, Lythraceae.
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
- Study period:
- 21.5.2018-12.6.2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Freshwater Alga and Cyanobacteria, Growth Inhibition Test)
- Version / remarks:
- 2011
- Qualifier:
- according to guideline
- Guideline:
- other: OECD series on testing and assessment no 23 (Guidance document on aquatic toxicity testing of difficult substances and mixtures)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Lawsonia inermis, ext.
- EC Number:
- 284-854-1
- EC Name:
- Lawsonia inermis, ext.
- Cas Number:
- 84988-66-9
- Molecular formula:
- na
- IUPAC Name:
- Lawsonia inermis, ext.
- Test material form:
- solid: particulate/powder
- Details on test material:
- Batch number:ONH/17/I/01
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
- Remarks:
- TOC
- Details on sampling:
- concentration 100 mg/l
Test solutions
- Vehicle:
- not specified
Test organisms
- Test organisms (species):
- Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)
- Details on test organisms:
- verified that the culture is suitable as a test organism.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
Test conditions
- Test temperature:
- 21-24±2°C
- pH:
- The growth media; 8,1±0,2°C
Results and discussion
Effect concentrations
- Key result
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- >= 100 - <= 100 mg/L
- Nominal / measured:
- meas. (initial)
- Conc. based on:
- test mat. (dissolved fraction)
- Basis for effect:
- growth rate
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- It's on the borderline. Further investigations shall be considered.
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