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EC number: 235-120-4 | CAS number: 12070-08-5
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:
- 2021-06-22
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- ISO 13320:2009 “Particle size analysis – Laser diffraction methods”
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Remarks:
- Water as dispersion liquid
- Type of distribution:
- volumetric distribution
- Percentile:
- D10
- Mean:
- 0.7 µm
- Remarks on result:
- other: applying Fraunhofer approximation, Urel +/- 14%
- Percentile:
- D50
- Mean:
- 2.07 µm
- Remarks on result:
- other: applying Fraunhofer approximation, Urel +/- 4%
- Percentile:
- D90
- Mean:
- 4.33 µm
- Remarks on result:
- other: applying Fraunhofer approximation, Urel +/- 8%
- Conclusions:
- The following mean diameters (distribution type: volume) could be determined by laser diffraction analysis: D90 = 4.33 μm ± 8 % (Urel), D50 = 2.07 μm ± 4 % (Urel), D10= 0.70 μm ± 14 % (Urel).
- Executive summary:
A guideline study according to ISO 13320:2009 (Particle size analysis - Laser diffraction methods) was conducted for determination of the particle size distribution of the test substance titanium carbide in water as dispersion medium. The following particle size distribution could be determined by laser diffraction analysis: D90 = 4.33 μm ± 8 % (Urel), D50 = 2.07 μm ± 4 % (Urel), D10= 0.70 μm ± 14 % (Urel).
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 2011-10-17
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320:2009
- Deviations:
- no
- Principles of method if other than guideline:
- The particle size distribution was determined by laser diffraction according to the guideline ISO 13320:2009 with the MasterSizer S. The technique of laser diffraction is based on the principle that particles passing through a laser beam will scatter light at an angle that is directly related to their size: large particles scatter at low angles, whereas small particles scatter at high angles. The laser diffraction is accurately described by the Fraunhofer approximation, with the assumption of spherical particle morphology.
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Key result
- Percentile:
- D50
- Mean:
- 2.13 µm
- No.:
- #1
- Size:
- 0.57 µm
- Distribution:
- 5 %
- No.:
- #2
- Size:
- 0.76 µm
- Distribution:
- 10 %
- No.:
- #3
- Size:
- 0.94 µm
- Distribution:
- 15 %
- No.:
- #4
- Size:
- 1.11 µm
- Distribution:
- 20 %
- No.:
- #5
- Size:
- 1.27 µm
- Distribution:
- 25 %
- No.:
- #6
- Size:
- 1.44 µm
- Distribution:
- 30 %
- No.:
- #7
- Size:
- 1.6 µm
- Distribution:
- 35 %
- No.:
- #8
- Size:
- 2.13 µm
- Distribution:
- 50 %
- No.:
- #9
- Size:
- 4.34 µm
- Distribution:
- 90 %
- No.:
- #10
- Size:
- 7.72 µm
- Distribution:
- 100 %
- Conclusions:
- The following mean diameters (distribution type: volume) could be determined:
D (v, 0.1) = 0.76 µm D (v, 0.5) = 2.13 µm D (v, 0.9) = 4.34 µm - Executive summary:
The granulometric properties of titanium carbide were analysed by the laser diffraction method according to ISO 13320:2009 (Particle size analysis - Laser diffraction methods). The particle size distribution was determined using the particle size analysator MastersizerS from Malvern Instruments. The following mean diameters (distribution type: volume) could be determined:
D (v, 0.1) = 0.76 µm D (v, 0.5) = 2.13 µm D (v, 0.9) = 4.34 µm
Referenceopen allclose all
Mean diameters (distribution type: number) are for the same sample: D90 = 0.89 μm ± 8 % (Urel), D50 = 0.37 μm ± 4 % (Urel), D10 = 0.23 μm ± 14% (Urel).
Description of key information
The following mean volume diameters were determined for titanium carbide:
D90 = 4.33 μm ± 8 % (Urel), D50 = 2.07 μm ± 4 % (Urel), D10= 0.70 μm ± 14 % (Urel).
Additional information
The laser diffraction test using water as dispersion liquid, performed in accordance to ISO 13320:2009 produced the following mean diameters of titanium carbide (distribution type: volume) by applying Fraunhofer approximation:
Thieleke_2021: D90 = 4.33 μm ± 8 % (Urel), D50 = 2.07 μm ± 4 % (Urel), D10= 0.70 μm ± 14 % (Urel).
In the Reach Certificate from 2011 the median values of particle size were in the same range:
Certificate Reach_2011: D90 = 4.34 µm, D50 = 2.13 µm, D10 = 0.76 µm
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