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Diss Factsheets
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EC number: 946-856-7 | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_ecotoxicological-information.png)
Toxicity to aquatic plants other than algae
Administrative data
- Endpoint:
- toxicity to aquatic plants other than algae
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 12 – 19 November 2018
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2019
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 221 (Lemna sp. Growth Inhibition Test)
- Version / remarks:
- 23 March 2006
- GLP compliance:
- yes (incl. QA statement)
Test material
- Test material form:
- solid: particulate/powder
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
- Details on sampling:
- Photometric analysis of the test item concentration in the test solutions was performed to
determine exposure concentration and stability of the test item during the test. One analytic sample
of ca. 10 mL was taken from each of the two additional vessels of treatment A, C, E and NC at the
start of the experiment and after 2 d, 4 d and 7 d. The samples were filled into 15 mL falcons and
stored in the fridge (5°C ± 3°C) until measurement.
Replicate 1 of the analytic samples of the treatments A, C, E and NC from day 0, 2, 4 and 7 was
analyzed within ≤ 7 d after sampling. The storage stability of the analytical samples was verified
over a period of 7 d (Validation Study No. 1393, Hydrotox GmbH). The remaining samples were
stored as retain samples in the fridge (5 °C ± 3 °C) until finalization of the study.
Test solutions
- Vehicle:
- no
- Remarks:
- No vehicle was used, as test item is soluble in test medium
- Details on test solutions:
- Steinberg medium
Test organisms
- Test organisms (species):
- Lemna minor
- Details on test organisms:
- duckweed Lemna minor obtained from the German Federal Environment Agency (UBA), Berlin-Marienfelde
Study design
- Test type:
- static
- Water media type:
- freshwater
- Total exposure duration:
- 7 d
Test conditions
- Test temperature:
- 24.7 to 25.6 °C
- pH:
- 5.5 - 6.6
- Nominal and measured concentrations:
- nominal active substance concentrations 18.75, 37.5., 75, 150 and 300 mg/L
- Reference substance (positive control):
- yes
Results and discussion
Effect concentrationsopen allclose all
- Key result
- Duration:
- 7 d
- Dose descriptor:
- EC10
- Effect conc.:
- 19.89 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr. (dissolved fraction)
- Basis for effect:
- frond number
- Key result
- Duration:
- 7 d
- Dose descriptor:
- LOEC
- Effect conc.:
- <= 18.75 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr. (dissolved fraction)
- Basis for effect:
- frond number
- Key result
- Duration:
- 7 d
- Dose descriptor:
- NOEC
- Effect conc.:
- <= 18.75 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr. (dissolved fraction)
- Basis for effect:
- frond number
- Details on results:
- As the measured active substance concentrations are all within ± 20 % of the nominal
concentrations, according to OECD 221 (2006), all results are given in relation to the nominal
active substance concentrations.
The maximum inhibitions at the highest measured test-concentration (100 mg/L) of the Growth rate for Frondnumber
(8.1%), Frondarea (13.5%) and of the Yield for Frondnumber (20.2%), Frondarea (9.1%) were well below 50% inhibition.
Therefore the statistical evaluation for ECx was partially not possible or not meaningful and presented as: > 100 mg/L. - Results with reference substance (positive control):
- The EC50(growth rate, frond number) for the reference substance 3,5-Dichlorophenol was 2.8
mg/L (2.3 – 3.3 mg/L 95%-CI) which is in-line with the requirements of the ISO 20079 (2005)
[Lemna, Growth Inhibition Test] of 2.2 – 3.8 mg/.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- EC50 n.d. (7d, growth rate, frondnumber)
EC10 19.89 mg/L (7d, growth rate, frondnumber)
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.
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