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EC number: 263-272-1 | CAS number: 61847-48-1
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:
- 17 Aug 2011
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- According to appendix R7-1 of ECHA Guidance on Information Requirements and Chemical Safety Assessment multiple techniques should be applied to investigate phys. chem. properties of particulates, although different measurement methods may not provide comparable results. Laser diffraction is the well experienced standard procedure for pigments to determine particle size distribution of the pigment as it is manufactured and delivered.
- Principles of method if other than guideline:
- Particle size determination by laser diffraction
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Percentile:
- D50
- Mean:
- 3.5 µm
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 0.56 µm
- St. dev.:
- 0.05
- Percentile:
- D50
- Mean:
- 3.5 µm
- St. dev.:
- 0.5
- Percentile:
- D90
- Mean:
- 11.9 µm
- St. dev.:
- 2.4
- Conclusions:
- The test substance has a median particle size of 3.5 micrometer.
- Executive summary:
The particle size of the test substance was determined by Malvern laser diffraction. The test substance has a median particle size of 3.5 micrometer.
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 17 Aug 2011
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- According to appendix R7-1 of ECHA Guidance on Information Requirements and Chemical Safety Assessment multiple techniques should be applied to investigate phys. chem. properties of particulates, although different measurement methods may not provide comparable results. Laser diffraction is the well experienced standard procedure for pigments to determine particle size distribution of the pigment as it is manufactured and delivered.
- Justification for type of information:
- See Rationale and Justification for the Analogue Read-Across Approach for the registration of the Nanoform of Pigment Red 188 using Pigment Red 22, Pigment Red 112 and Pigment Orange 38 as Source Substances (Chapter 13)
- Reason / purpose for cross-reference:
- read-across source
- Principles of method if other than guideline:
- Particle size determination by laser diffraction
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Percentile:
- D50
- Mean:
- 3.5 µm
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 0.56 µm
- St. dev.:
- 0.05
- Percentile:
- D50
- Mean:
- 3.5 µm
- St. dev.:
- 0.5
- Percentile:
- D90
- Mean:
- 11.9 µm
- St. dev.:
- 2.4
- Conclusions:
- The test substance has a median particle size of 3.5 micrometer.
- Executive summary:
The particle size of the test substance was determined by Malvern laser diffraction. The test substance has a median particle size of 3.5 micrometer.
Referenceopen allclose all
A few particle clusters (>2 mm) were found in the inlet sieve of the measuring system.
For further percentiles see attached report.
Given standard deviation is based on the general experience with the method and pigments. The estimated values are typical standard deviations for pigments:
D10: 4% of D10 (minimum value 0,05 µm)
D50: 13% of D50 (minimum value 0,1 µm)
D90: 29% of D90 - D50
.A few particle clusters (>2 mm) were found in the inlet sieve of the measuring system.
For further percentiles see attached report.
Given standard deviation is based on the general experience with the method and pigments. The estimated values are typical standard deviations for pigments:
D10: 4% of D10 (minimum value 0,05 µm)
D50: 13% of D50 (minimum value 0,1 µm)
D90: 29% of D90 - D50
.
Description of key information
The particle size of the test substance was determined by Malvern laser diffraction. The test substance has a median particle size of 3.5 micrometer.
Additional information
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.
