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Diss Factsheets
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EC number: 236-740-8 | CAS number: 13472-08-7
- 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
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Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
- Version / remarks:
- The study was conducted according to the test guidelines in effect at the time of study conduct.
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- electrical sensing zone (e.g. Coulter) method
- Type of distribution:
- other: electrical sensing zone
- Specific details on test material used for the study:
- Purity: 99.56%
- Percentile:
- other: R10
- Mean:
- 21 µm
- Remarks on result:
- other: see Remark
- Remarks:
- The R10, R50, and R90 values are Stoke’s radius equivalents of the traditional D10, D50 and D90 values; for 2 μm to 200 μm
- Percentile:
- other: R50
- Mean:
- 42.2 µm
- Remarks on result:
- other: see Remark
- Remarks:
- The R10, R50, and R90 values are Stoke’s radius equivalents of the traditional D10, D50 and D90 values; for 2 μm to 200 μm
- Percentile:
- other: R90
- Mean:
- 67.5 µm
- Remarks on result:
- other: see Remark
- Remarks:
- The R10, R50, and R90 values are Stoke’s radius equivalents of the traditional D10, D50 and D90 values; for 2 μm to 200 μm
- Percentile:
- other: Mean Rs
- Mean:
- 43.4 µm
- Remarks on result:
- other: see Remark
- Remarks:
- mean Stoke’s effective hydrodynamic radius for the material was determined to be 43.4 microns; for 2 μm to 200 μm
- Conclusions:
- This study and the conclusions which are drawn from it fulfill the quality criteria (validity, reliability, repeatability).
Approximately, 99.9% of the material was found to have a radius between 2 and 200 microns. Mean radius = 43.5 microns. - Executive summary:
The test substance particles were determined to consist of mostly irregular spheroids.
OECD 110 Method A: The electrosensing zone analysis of three separate preparations indicated an effective single modal distribution of the test material. The samples were analyzed at pH 7.0 using a concentration of approximately 0.02 mg test substance compound to one gram of the saturated solution . The mean particle size diameter averaging the full distribution of three analyses was determined to be 43.5 microns corresponding to approximately 100 percent of the sample. This data is in reasonable agreement with light scattering data which provided a mean radius of 33.2 microns giving a coefficient of variation of 18.9% between the measurements. The mass of particles having a radius below 2 microns was determined by electrosensing zone measurement. A statistically significant value from the mass balance was not achieved. The mean Stoke’s effective hydrodynamic radius for the material was determined to be 43.4 microns assuming equivalence between the electrical sensing zone radius and Stoke’s hydrodynamic radius. The R10, R50, and R90 values are Stoke’s radius equivalents of the traditional D10, D50 and D90 values. That is R10 represents the Rs at which 10% of the material with an Rs between 2 and 200 microns falls below. Similarly, R50 represents the Rs for 50% and R90 the Rs for 90%.
Reference
The test substance particles were determined to consist of mostly irregular spheroids.
OECD 110 Method A: The Multisizer III, electrosensing zone analysis of three separate preparations indicated an effective single modal distribution of the test material. The samples were analyzed at pH 7.0 using a concentration of approximately 0.02 mg test substance compound to one gram of the saturated solution . The mean particle size diameter averaging the full distribution of three analyses was determined to be 43.5 microns corresponding to approximately 100 percent of the sample. This data is in reasonable agreement with light scattering data which provided a mean radius of 33.2 microns giving a coefficient of variation of 18.9% between the measurements. The mass of particles having a radius below 2 microns was determined by electrosensing zone measurement. A statistically significant value from the mass balance was not achieved. The mean Stoke’s effective hydrodynamic radius for the material was determined to be 43.4 microns assuming equivalence between the electrical sensing zone radius and Stoke’s hydrodynamic radius. The R10, R50, and R90 values are Stoke’s radius equivalents of the traditional D10, D50 and D90 values. That is R10 represents the Rs at which 10% of the material with an Rs between 2 and 200 microns falls below. Similarly, R50 represents the Rs for 50% and R90 the Rs for 90%.
Analysis |
Mass Percent for given Rs |
Additional Data for 2 μm to 200 μm |
|||||
<2 μm |
2 μm to 200 μm |
>200 μm |
Mean Rs |
R10 |
R50 |
R90 |
|
Analysis #1 |
0.1% |
99.9% |
0% |
44.6 |
21.6 |
42.5 |
71.0 |
Analysis #2 |
0.1% |
99.9% |
0% |
41.7 |
20.9 |
41.7 |
66.0 |
Analysis #3 |
0.1% |
99.9% |
0% |
42.4 |
20.5 |
42.4 |
65.5 |
Average |
0.1% |
99.9% |
0% |
43.4 |
21.0 |
42.2 |
67.5 |
Description of key information
~99.9% had a radius between 2 and 200 microns. Mean radius = 43.5 microns.
Additional information
OECD 110, using electrical sensing zone method
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.
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