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EC number: 806-801-9 | CAS number: 1539267-56-5
- 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
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
- Study period:
- 13 Setember 2019 to 24 September 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187 “Particle Size Analysis by Laser Diffraction”.
- Version / remarks:
- 2007
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
- Remarks on result:
- not measured/tested
- Key result
- Percentile:
- D10
- Mean:
- 8.98 µm
- St. dev.:
- 0.169
- Key result
- Percentile:
- D50
- Mean:
- 35.9 µm
- St. dev.:
- 0.626
- Key result
- Percentile:
- D90
- Mean:
- 105 µm
- St. dev.:
- 2.69
- Size:
- < 10 µm
- Distribution:
- 11.42 %
- Remarks on result:
- other: by volume
- Conclusions:
- Under the conditions of the study, findings from the average of five runs revealed the following results on the particle size of the test material:
- Volume weighted mean: 47.47 µm
- D10: 8.98 µm
- D50: 35.9 µm
- D90: 105 µm
11.42 % by volume of sample was seen to be < 10.00 µm.
The coefficient of variation for D50 is less than 3 %; D10 and D90 are less than 5 %. Thus repeatability of the characteristic particles in the size distribution is within the acceptable limits as per the ISO 13320-1 test standard. - Executive summary:
The particle size distribution of the test material was determined by laser diffraction, under GLP conditions and according to the standardised guideline ISO 13320-1.
Under the conditions of the study, findings from the average of five runs revealed the following results on the particle size of the test material:
- Volume weighted mean: 47.47 µm
- D10: 8.98 µm
- D50: 35.9 µm
- D90: 105 µm
11.42 % by volume of sample was seen to be < 10.00 µm.
The coefficient of variation for D50 is less than 3 %; D10 and D90 are less than 5 %. Thus repeatability of the characteristic particles in the size distribution is within the acceptable limits as per the ISO 13320-1 test standard.
Reference
Optical Microscope Analysis
- Direct observation: Test material observed to be a fine-medium white powder with clusters.
- Under a microscope at 100x magnification: The particles appeared to be irregular shaped crystals that consisted of individual particles and some agglomerations. The smallest individual particle size was approximately 3 µm and the largest individual size was approximately 128 µm.
- Under a microscope at 400x magnification: The test material was observed to be made up of single crystalline particles, some of which had agglomerated.
Preliminary Solubility and Dispersability
Kerosene: not soluble but well dispersed
Silicone oil: not soluble but well dispersed
Main Solubility and Dispersibility Study
The test material was well dispersed in two of the two solvents tested (kerosene and silicone oil). Silicone oil was selected for the analysis as it could hold particles in suspension for a longer duration due to its viscosity.
Laser Diffraction Particle Size Analysis
During the method development phase of the analysis trials were conducted using both the small volume (wet) module (SVM). The SVM trials were conducted using silicone oil as the dispersant. The results of these trials indicated that the most appropriate test and material parameters to obtain the optimum measurements were:
Module: SVM
Dispersant: Silicone Oil
Dispersion speed: 2200 rpm
Refractive index (sample): 0.00 n
Absorption: 0.0 AU
Analysis Model: General Purpose
Using the identified parameters, the particle size was analysed over the range 0.01 µm to 3500 µm.
Laser Diffraction Particle Size Analysis
|
Run 1 |
Run 2 |
Run 3 |
Run 4 |
Run 5 |
Average |
STDVP |
% STDVP |
VWM |
47.2 |
46.2 |
48.5 |
48.1 |
46.9 |
47.47 |
N/A |
N/A |
Mode |
35.4 |
36.0 |
367 |
38.1 |
38.8 |
36.9 |
N/A |
N/A |
d10 |
8.81 |
8.81 |
9.02 |
9.18 |
9.10 |
8.98 |
0.169 |
1.88 |
d50 (median) |
35.4 |
35.1 |
36.2 |
36.6 |
36.1 |
35.9 |
0.626 |
1.75 |
d90 |
105 |
102 |
108 |
106 |
102 |
105 |
2.69 |
2.57 |
GSD |
2.918 |
2.896 |
2.931 |
2.884 |
2.881 |
2.902 |
0.128 |
4.6 |
All particle size results are in µm.
VWM: Volume weighted mean.
d10: 10 % of the test item is less than this particle size.
d50: 50 % of the test item is less than this particle size.
d90: 90 % of the test item is less than this particle size.
GSD: Geometric standard deviation of the lognormal particle size distribution.
Average: Calculated from the entirety of the data captured in each run and not a simple arithmetic mean.
STDVP: Standard deviation of the population.
% STDVP: percentage standard deviation of the population.
11.42 % by volume of sample was seen to be < 10.00 µm.
The coefficient of variation for D50 is less than 3 %; D10 and D90 are less than 5 %. Thus repeatability of the characteristic particles in the size distribution is within the acceptable limits as per the ISO 13320-1 test standard.
Description of key information
Under the conditions of the study, findings from the average of five runs revealed the following results on the particle size of the test material:
- Volume weighted mean: 47.47 µm
- D10: 8.98 µm
- D50: 35.9 µm
- D90: 105 µm
11.42 % by volume of sample was seen to be < 10.00 µm.
The coefficient of variation for D50 is less than 3 %; D10 and D90 are less than 5 %. Thus repeatability of the characteristic particles in the size distribution is within the acceptable limits as per the ISO 13320-1 test standard.
Additional information
The particle size distribution of the test material was determined by laser diffraction, under GLP conditions and according to the standardised guideline ISO 13320 -1.
Under the conditions of the study, findings from the average of five runs revealed the following results on the particle size of the test material:
- Volume weighted mean: 47.47 µm
- D10: 8.98 µm
- D50: 35.9 µm
- D90: 105 µm
11.42 % by volume of sample was seen to be < 10.00 µm.
The coefficient of variation for D50 is less than 3 %; D10 and D90 are less than 5 %. Thus repeatability of the characteristic particles in the size distribution is within the acceptable limits as per the ISO 13320-1 test standard.
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