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EC number: 253-292-9 | CAS number: 36968-27-1
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 26 Mar 2012
- 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.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320-1
- Principles of method if other than guideline:
- Sieving and particle size distribution of the fine fraction by laser diffraction
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- 4-[[4-(aminocarbonyl)phenyl]azo]-3-hydroxy-N-(2-methoxyphenyl)naphthalene-2-carboxamide
- EC Number:
- 253-292-9
- EC Name:
- 4-[[4-(aminocarbonyl)phenyl]azo]-3-hydroxy-N-(2-methoxyphenyl)naphthalene-2-carboxamide
- Cas Number:
- 36968-27-1
- Molecular formula:
- C25H20N4O4
- IUPAC Name:
- 4-[(4-carbamoylphenyl)diazenyl]-3-hydroxy-N-(2-methoxyphenyl)-2-naphthamide
- Test material form:
- not specified
Constituent 1
Results and discussion
Particle sizeopen allclose all
- Percentile:
- D50
- Mean:
- 52.9 µm
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 4.7 µm
- St. dev.:
- 0.2
- Percentile:
- D50
- Mean:
- 52.9 µm
- St. dev.:
- 6.9
- Percentile:
- D90
- Mean:
- 274.8 µm
- St. dev.:
- 64.4
Any other information on results incl. tables
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
Applicant's summary and conclusion
- Conclusions:
- The median particle size of the fine fraction (6.6% (w/w)) of the test substance is 52.9 µm.
- Executive summary:
The particle size of the fine fraction of the test substance was determined by laser diffraction after sieving with a 1.18 mm sieve. The test substance consists of 93.4% (w/w) coarse fraction. The median particle size of the fine fraction (6.6% (w/w)) of the test substance is 52.9 µm.
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