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Diss Factsheets
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EC number: 923-418-3 | 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 algae and cyanobacteria
Administrative data
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2006/11/20-2006/11/24
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: No amendment to the study plan was requested. No incident, which could have affected the quality or the interpretation of the results obtained, was observed.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 007
- Report date:
- 2007
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 201 (Alga, Growth Inhibition Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- 2007/01/12
Test material
- Reference substance name:
- MONTANOV 14
- IUPAC Name:
- MONTANOV 14
- Details on test material:
- - Batch: T53815
- Appearence: pearls of wax
- Purity: ES>99%
- Stability: water 96h
- Solubility water <0.1 g/L
- Storage: at room temperature 20 +/-5 °C
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
- Details on sampling:
- Concentrations: 1 / 10 / 100 mg/L
Test solutions
- Vehicle:
- no
- Details on test solutions:
- As the solubility lies below 100mg/L, the water accomodated fraction was prepared for the test. This was done by weighing of each nominal load, adding the corresponding amount of deionised water and shaking vigorously for 24 hours. The resulting solutions were filtrated through 0.45 um filters.
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Details on test organisms:
- - Strain: CHODAT
- Source: institut fur Pflanzenphysiologie of Universitât Gôttingen.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 72 h
Test conditions
- Test temperature:
- 23-25°C
- pH:
- 8.1-8.8
- Nominal and measured concentrations:
- 1 / 10 / 100 mg/L (nominal concentrations)
- Details on test conditions:
- Experimental conditions:
Lighting: 4440-8880 lux
Control: deionised water with nutrient medium and algae
Treatment: test solution with nutrient medium and algae
Study paramters:
number of replicates: six replicates for the control
three replicates for each treatment
The cell concentration of each replicate was determined by measuring the absorption of the cuvettes at 440 nm avery 24 hours with a spectral photometer. - Reference substance (positive control):
- yes
- Remarks:
- K2Cr2O7
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- ca. 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- NOEC
- Effect conc.:
- ca. 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- cell number
- Duration:
- 72 h
- Dose descriptor:
- EL50
- Effect conc.:
- ca. 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- LOEC
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- LOEC
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- cell number
- Duration:
- 72 h
- Dose descriptor:
- LOEC
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- cell number
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Results with reference substance (positive control):
- NOEC 72h= 0.1 mg/L
LOEC 72h= 0.16mg/L
72h ErC50= 1.1mg/L
72h EbC50=0.36mg/L
72h EyC50= 0.3mg/L
72h ErC100> 1.6 mg/L
72h EbC100> 1.6 mg/L
72h EyC100> 1.6 mg/L
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- 72 h NOEC ca. 100 mg/L
72 h NOEC ca. 100 mg/L
72 h EL50 ca. 100 mg/L
72 h LOEC > 100 mg/L
72 h LOEC > 100 mg/L .
72 h LOEC > 100 mg/L
72 h EC50 > 100 mg/L
72 h EC50 > 100 mg/L
72 h EC50 > 100 mg/L - Executive summary:
The aim of this study is to assess the toxicity of the test item against Desmodesmus subspicatus, an aquatic algae.
This study was conduced in compliance withe OECD guideline n°201 resp EUC.3 and according to the GLP.
As the solubility lies below 100mg/L, the water accomodated fraction was prepared for the test. This was done by weighing of each nominal load, adding the corresponding amount of deionised water and shaking vigorously for 24 hours. The resulting solutions were filtrated through 0.45 um filters.
In the main study, three concentrations of the test item in a geometric series (spaced by factor 10, thye highest being 100mg/L) were used. The treatments were used to incubate the unicellular freshwater green alga Desmodesmus subspicatus for a period of 72 hours.
The cell concentration of each replicate was determined by measuring the absorption of the cuvettes at 440 nm avery 24 hours with a spectral photometer. With these measured values, the number of cells was calculated (linear correlation between cell concentration and aborption given). Then the growth rate, the area under the curve (AUC) and the yield could be determined.
The EC50s of potassium dichromate was tested in a current reference test. The values lay within the normal range of the laboratory.
Conclusion:
72 h NOEC ca. 100 mg/L
72 h NOEC ca. 100 mg/L
72 h EL50 ca. 100 mg/L
72 h LOEC > 100 mg/L
72 h LOEC > 100 mg/L .
72 h LOEC > 100 mg/L
72 h EC50 > 100 mg/L
72 h EC50 > 100 mg/L
72 h EC50 > 100 mg/L
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