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Diss Factsheets
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EC number: 946-013-3 | 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
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:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Peer-reviewed technical publication that meets basic scientific principles.
Data source
Reference
- Reference Type:
- publication
- Title:
- Toxicity Tests of Aquatic Pollutants by Using Common Duckweeed
- Author:
- Wang, W
- Year:
- 1 986
- Bibliographic source:
- Environmental Pollution (Series B) 11 (1986) 1-14
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Six different concentrations of boron were added to glass jars with duckweed and growth was recorded.
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Boric acid
- EC Number:
- 233-139-2
- EC Name:
- Boric acid
- Cas Number:
- 10043-35-3
- Molecular formula:
- H3BO3
- IUPAC Name:
- Boric acid
- Details on test material:
- Chemical test compounds were reagent grade.
Constituent 1
Sampling and analysis
- Analytical monitoring:
- not specified
Test solutions
- Vehicle:
- no
Test organisms
- Test organisms (species):
- Lemna minor
- Details on test organisms:
- TEST ORGANISM
- Common name: Duckweed
- Source (laboratory, culture collection): collected from a pond located inside the Illinois State Water Survey property during the spring of 1982
- Method of cultivation: The stock was maintained in a polypropylene tray with 20 litre capacity. To the tray was added a small amount of sediment, collected from the same pond, 10 litres of pond water and 5 litres of cold tap water. Every 3-4 days cold tap water was added to maintain the water level.
- 24 h before testing duckweed samples were selected for tests. The selected specimens must appear healthy, with 2 fronds of +- equal size per colony
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 7 d
Test conditions
- Test temperature:
- 27 +- 2 °C
- pH:
- 7.5
- Details on test conditions:
- TEST SYSTEM
- Test vessel:
- Material, size, headspace, fill volume: 200 ml fruit jars, to each jar was added a toxicant and 200 ml of plant nutrient solution
- No. of colonies per vessel: 20
- No. of fronds per colony: 2
- No. of vessels per concentration (replicates): 3 - 6
- No. of vessels per control (replicates): 3 - 6
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: nutrient solution prepared according to Standard Methods (1980) by using deionised water
OTHER TEST CONDITIONS
- Light intensity and quality: cool-white fluorescent light with an intensity of 6456 lux
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
- Determination of frond number: manual counting
Results and discussion
Effect concentrations
- Duration:
- 7 d
- Dose descriptor:
- NOEC
- Effect conc.:
- >= 60 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- element
- Basis for effect:
- frond number
Any other information on results incl. tables
7d EC50 growth >60 mg B/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.