Registration Dossier
Registration Dossier
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EC number: 205-739-4 | CAS number: 149-44-0
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
The particle size is not an intrinsic substance property, but depends on the grinding of the material after drying. The D50 of the powdery substance may vary between ca. 70 and 300 µm. No remarkable amounts are below 10 µm.
Additional information
The particle size distribution of the test item was determined in by two methods:
Using the sedimentation (fixed pipette) method (OECD 110) the particle size distribution shows a continuous distribution from approximately 12 µm, (leaving a fraction of less than 10% below 10 µm) to approx. 70 µm.
Using the sieve tower method (DIN 66165) the testing of the substance results in an average particle size (D50) of 175 µm resp. 300 µm.
The particle size of the substance predominantly varies with the grinding of the material.
The occurrence of alveolar particles can be neglected.
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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