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EC number: 274-778-7 | CAS number: 70693-62-8
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:
- 2009-05-29
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- optical-based particle sizing technique using light scattering and diffraction characteristics (Fraunhofer diffraction method)
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Key result
- Percentile:
- D50
- Mean:
- >= 262.289 - <= 621.966 µm
- Remarks on result:
- other: St. dev. not given
- No.:
- #1
- Size:
- >= 95.299 - <= 136.734 µm
- Distribution:
- 5 %
- No.:
- #2
- Size:
- >= 150.177 - <= 250.166 µm
- Distribution:
- 16 %
- No.:
- #3
- Size:
- >= 262.289 - <= 621.966 µm
- Distribution:
- 50 %
- No.:
- #4
- Size:
- >= 401.784 - <= 1 251.1 µm
- Distribution:
- 84 %
- No.:
- #5
- Size:
- >= 509.212 - < 1 687.74 µm
- Distribution:
- 95 %
- Conclusions:
- The particle size distribution for particles below 10 µm for two test samples were found to be 0.174 % and 0.101 %, respectively.
- Executive summary:
The particle size distribution for particles below 10 µm for two test samples were found to be 0.174 % and 0.101 %, respectively, using a Beckmann Coulter LS 13 320 (laser diffraction techniques). The LS 13 320 was set up to measure particles between 0.4 - 2000 µm. This range meets the need to determine the percentage volume below 10 µm.
Particles below 10 µm are known to bear a inhalation risk of the test substance.
Reference
The following table is an extraction of the raw data near 10 µm used for linear regression in order to determine the value at 10 µm.
| µm | #1 | # 2 |
| 7.421 | 0.132 | 0.074 |
| 8.142 | 0.145 | 0.081 |
| 8.943 | 0.158 | 0.090 |
| 9.817 | 0.172 | 0.099 |
| 10.777 | 0.187 | 0.109 |
| 11.831 | 0.203 | 0.119 |
| 12.988 | 0.211 | 0.131 |
| 14.257 | 0.241 | 0.145 |
| 15.651 | 0.263 | 0.159 |
| 10.000 | 0.174 | 0.101 |
Description of key information
The particle size distribution for particles below 10 µm for two test samples were found to be 0.174 % and 0.101 %, respectively, using a
Beckmann Coulter LS 13 320 (laser diffraction techniques). The LS 13 320 was set up to measure particles between 0.4 - 2000 µm. This range meets the need to determine the percentage volume below 10 µm.
Additional information
Particles below 10 µm are known to bear a inhalation risk of the test substance.
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.
