Registration Dossier
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EC number: 701-326-2 | CAS number: -
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:
- 2012-05-31 to 2012-06-07
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Remarks:
- The method is not related to a guideline, but is nevertheless acceptable. The substance is considered to be adequately characterised with its purity. Therefore validation applies, with minor restrictions.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Sieving with column of standard sieves and mechanical shaking.
- GLP compliance:
- no
- Type of method:
- sieving
- Type of distribution:
- mass based distribution
- No.:
- #1
- Size:
- 1 000 µm
- Distribution:
- 96.3 %
- Remarks on result:
- other: %m/m retained on individual sieve
- No.:
- #2
- Size:
- 630 µm
- Distribution:
- 2 %
- No.:
- #3
- Size:
- 315 µm
- Distribution:
- 1.1 %
- No.:
- #4
- Size:
- 250 µm
- Distribution:
- 0.2 %
- No.:
- #5
- Size:
- 200 µm
- Distribution:
- 0.1 %
- No.:
- #6
- Size:
- 125 µm
- Distribution:
- 0.1 %
- No.:
- #7
- Size:
- 100 µm
- Distribution:
- 0 %
- No.:
- #8
- Size:
- 75 µm
- Distribution:
- 0.1 %
- No.:
- #9
- Size:
- 63 µm
- Distribution:
- 0 %
- Conclusions:
- The substance contains no inhable particle. Low potential for dust explosion.
- Executive summary:
Particle size distribution of the test substance was determined by sieving on a column with 9 mesh sizes from 1000 to 63 µm.
Five replicates were conducted, and the average distribution was reported.
With regard to inhalation potential, 99.9% of particles are larger than 100 μm, and no particles are smaller than 63 µm, therefore can't reach the thoracic fraction.
Fine particles relevant to dust explosion hazard (<630 μm) are less than 2%.
Reference
In individual measurements, a 100% cumulative retained was found respectively on mesh of 315, 250, 125, 75 and 75 µm.
From the average distribution above, 99.9% of particles are above 100 µm, and no particles are smaller than 63 µm.
Description of key information
The substance contains no inhable particle (99.9% larger than 100 µm).
Low potential for dust explosion (<2% smaller than 630 µm).Additional information
An experimental study is available. Despite restrictions as not related to a guideline, it is considered reliable and sufficient for purpose, and therefore a key study.
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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