Registration Dossier
Registration Dossier
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EC number: 229-355-1 | CAS number: 6486-23-3
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2004
- 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:
- 2 011
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320-1
- Principles of method if other than guideline:
- Malvern laser diffraction
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- 2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutyramide
- EC Number:
- 229-355-1
- EC Name:
- 2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutyramide
- Cas Number:
- 6486-23-3
- Molecular formula:
- C16H12Cl2N4O4
- IUPAC Name:
- 2-[(4-chloro-2-nitrophenyl)diazenyl]-N-(2-chlorophenyl)-3-oxobutanamide
- Test material form:
- solid: nanoform, no surface treatment
Constituent 1
Results and discussion
Particle sizeopen allclose all
- Key result
- Percentile:
- D10
- Mean:
- 0.67 µm
- St. dev.:
- 0
- Key result
- Percentile:
- D50
- Mean:
- 4 µm
- St. dev.:
- 0.5
- Key result
- Percentile:
- D90
- Mean:
- 194 µm
- St. dev.:
- 55
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 mass median diameter is 4 µm.
- Executive summary:
- The mass median diameter using Malvern laser diffraction (volumetric distribution) was determined to be 4 µm.
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