Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 836-530-1 | CAS number: 1296134-40-1
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:
- 16.08.2018
- 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:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- agglomerate
- Type of distribution:
- volumetric distribution
- Key result
- Percentile:
- D50
- Mean:
- 4.5 µm
- Remarks on result:
- other: SD not determined.
- Percentile:
- D10
- Mean:
- 1.1 µm
- Remarks on result:
- other: SD not determined.
- Percentile:
- D90
- Mean:
- 16 µm
- Remarks on result:
- other: SD not determined.
- Conclusions:
- The median particle size L50 of the test item deduced from the particle size distributions was 4.5 µm.
- Executive summary:
The determination of the particle size distribution by laser diffraction of the test item was performed according to the OECD Guideline 110 by laser diffraction. The median particle size L50 of the test item deduced from the particle size distributions was 4.5 µm.
Reference
The test item consisted of agglomerates with different size and shape. The formation of agglomerates may have influenced the measurement.
The particles were introduced to the analyser beam by the dry powder feeder by direct spraying through the measuremnt area. The powder was loosened by an integrated vibrator. The particles were dispersed and fed to the optical system by pressurized dry air (15. bar). After passing the analyser beam the sample was collected in a vacuum cleaner.
After adjusting the laser, measuring the background and adjusting the correct particle concentration (obscuration) the measurement was started. The control software automatically performed three measurements. The average of these three measurements was given as result. Two test series of three measurements each were performed. The measurement time was8s.
For each test series fractions (left axis of the ordinate) and the siftings (right axis of the ordinate) are presented in percent by volume as a function of the particle size. 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:
1sttest series: L50=4.8μm
2ndtest series: L50=4.2μm
The average of the median particle size L50was: L50=4.5μm
The particle size L10 (D (v, 0.1 ): 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:
1sttest series: L10=1.1μm
2ndtest series: L10=1.0μm
The average of the particle size L10was: L10=1.1μm
The particle size L90(D (v, 0.9): 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:
1sttest series: L90=18.5μm
2ndtest series: L90=13.3μm
The average of the particle size L90was: L90=16μm
The particle size distribution showed a polymodal distribution. A first maximum was observed at approx. 4 - 6 µm with a shoulder at approx. 0.4 µm. A second maximum was observed at approximately 200 µm.
Description of key information
The median particle size L50 of the test item deduced from the particle size distributions was 4.5 µm.
Additional information
The determination of the particle size distribution by laser diffraction of the test item was performed according to the OECD Guideline 110 by laser diffraction. The median particle size L50 of the test item deduced from the particle size distributions was 4.5 µm.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
