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Diss Factsheets
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EC number: 600-039-9 | CAS number: 10023-48-0
- 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:
- 10 Aug - 16 Aug 2016
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- Overall median particle size is an average of result from sieving analysis and of result from laser diffraction/scattering method.
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- adopted in 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: DIN ISO 3310-1: Analytical Sieves
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- other: opaque partciles of irregular shapes, tending to agglomerate
- Type of distribution:
- volumetric distribution
- Specific details on test material used for the study:
- Storage conditions: Ambient temperature (10 to 30 °C)
- Percentile:
- D10
- Mean:
- 192.4 µm
- St. dev.:
- 19.94
- Remarks on result:
- other: Individual test results: 178.3 µm, 206.5 µm
- Percentile:
- D50
- Mean:
- 580.9 µm
- St. dev.:
- 37.97
- Remarks on result:
- other: Individual test results: 554.1 µm, 607.8 µm
- Percentile:
- D90
- Mean:
- 1 236 µm
- St. dev.:
- 53.03
- Remarks on result:
- other: Individual results: 1199 µm, 1274 µm
- Percentile:
- D50
- Mean:
- 2 200 µm
- Remarks on result:
- other: Median particle size of test item deduced from sieve analysis of the fraction sieved to > 1000 µm (49 wt. %).
Reference
Results
Laser diffraction
Median values were calculated from unrounded values.
The median particle size L50(D (v, 0.5): 50% of
particle volume or particle mass with lower particle diameter) deduced
from these distributions were:
1st test series L50= 554.1 µm; 2nd test
series L50= 607.8 µm
The average of the median particle size: L50= 580.9 µm
The particle size L10(D (v, 0.1): 105 of particle
volume or particle mass with lower particle diameter) deduced from these
distributions were:
1st test series: L10= 178.3 µm; 2nd test
series: L10= 206.5 µm
The average of the particle size: L10= 192.4 µm
The particle size L90(D (v, 0.9): 90% of particle
volume or particle mass with lower particle diameter) deduced from these
distributions were:
1st test series: L90= 1199 µm; 2nd test
series: L90= 1274 µm
The average of the particle size: L90= 1236 µm
Sieving
Table 1 – Sieving analysis results
Mesh Size [µm] |
Range of particle size [µm] |
Fraction [g] |
Total [g] |
Fraction [%] |
Total [%] |
6300 |
>6300 |
11.46 |
11.46 |
7.68 |
7.68 |
4000 |
4000 – 6300 |
19.22 |
30.68 |
12.88 |
20.56 |
3150 |
3150 – 4000 |
12.70 |
43.38 |
8.51 |
29.08 |
2500 |
2500 – 3150 |
19.93 |
63.31 |
13.36 |
42.43 |
2000 |
2000 – 2500 |
19.50 |
82.81 |
13.07 |
55.50 |
1700 |
1700 – 2000 |
15.99 |
98.80 |
10.72 |
66.22 |
1400 |
1400 – 1700 |
19.98 |
118.78 |
13.39 |
79.61 |
1250 |
1250 – 1400 |
11.33 |
130.11 |
7.59 |
87.21 |
1000 |
0 – 1250 |
18.87 |
148.98 |
12.65 |
99.85 |
The missing amount to 100% (< 0.2%) could have been lost during handling of the open sieves and can be considered negligible. The median particle size was ca. 2200 µm.
Discussion
Since both methods used are based on different models, the results could
not be combined to obtain overall values. This was consolidated by the
fact that the laser diffraction showed particles > 1000 µm even when the
test item was sieved to < 1000 µm prior to the test. Therefore, the mean
value for both sieved fractions will be given as a final result.
Conclusion
The fractions were both nearly 50 wt. %, thus the overall median
particle size of the test item can be evaluated as being approximately
equal to 1000 µm.
The median test item particle size deduced from the laser diffraction of the fraction sieved to < 1000 µm (51 wt. %) was 581 µm.
The median test item particle size deduced from the sieve analysis of the fraction sieved to > 1000 µm (49 wt. %) was approximately 2200 µm.
Description of key information
Laser Diffraction Results (51 wt. %): D10 = 192.4 µm; D50 = 580.9 µm;
D90 = 1236 µm
Median particle size: 581 µm
Sieving Analysis (49 wt %) - median particle size: 2200 µm
Overall median particle size: 1000 µm
(OECD 110, Laser Diffraction/Scattering)
Additional information
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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