Registration Dossier
Registration Dossier
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EC number: 200-805-9 | CAS number: 74-11-3
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 25.02.2021 - 01.03.2021
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 021
- Report date:
- 2021
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
- Version / remarks:
- 1981
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
- Version / remarks:
- 1996
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2009
- Deviations:
- not specified
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- 4-chlorobenzoic acid
- EC Number:
- 200-805-9
- EC Name:
- 4-chlorobenzoic acid
- Cas Number:
- 74-11-3
- Molecular formula:
- C7H5ClO2
- IUPAC Name:
- 4-chlorobenzoic acid
- Test material form:
- solid: particulate/powder
- Details on test material:
- white to yellowish crytalline powder
Constituent 1
Results and discussion
- Mass median aerodynamic diameter:
- 207 µm
- Geometric standard deviation:
- 8.4
Particle sizeopen allclose all
- Key result
- Percentile:
- D90
- Mean:
- 589.1 µm
- St. dev.:
- 8.64
- Key result
- Percentile:
- D50
- Mean:
- 167.8 µm
- St. dev.:
- 5.4
- Key result
- Percentile:
- D10
- Mean:
- 13.1 µm
- St. dev.:
- 0.32
Any other information on results incl. tables
Two test series of 3 measurements each were performed with the test item.
Test series 1:
D10: 13.4 µm Standard deviation: 0.35 µm
D50: 173.2 µm (Median diameter) Standard deviation: 5.45 µm
D90: 597.7 µm Standard deviation: 16.19 µm
Test series 2:
D10: 12.8 µm Standard deviation: 0.24 µm
D50: 162.4 µm (Median diameter) Standard deviation: 3.80 µm
D90: 580.4 µm Standard deviation: 8.02 µm
Average
D10: 13.1 µm Standard deviation: 0.32 µm
D50: 167.8 µm (Median diameter) Standard deviation: 5.40 µm
D90: 589.1 µm Standard deviation: 8.64 µm
Applicant's summary and conclusion
- Conclusions:
- The test material of p-Chlorobenzoic acid has a median particle size of D50 = 168 µm.
- Executive summary:
The test item p-Chlorobenzoic acid has a median particle size of D50 = 167,8 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981), ISO 13320 (2009) and EPA OCSPP Test Guideline OPPTS 830.7520 (1996) and a MMAD of 207 µm with a GSD of 8.4
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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