Registration Dossier
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EC number: 201-248-4 | CAS number: 80-08-0
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:
- 22 April 2022
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Deviations:
- not specified
- Principles of method if other than guideline:
- Particle size measurement reports according to Hunstman specifications which are comparable to standard guidelines.
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Percentile:
- D90
- Mean:
- >= 60 µm
- Remarks on result:
- other: Std dev not specified
- Percentile:
- D50
- Mean:
- >= 27 µm
- Remarks on result:
- other: Std dev not specified
- Percentile:
- D10
- Mean:
- >= 11 µm
- Remarks on result:
- other: Std dev not specified
- Percentile:
- other: 98.5%
- Mean:
- < 100 µm
- Remarks on result:
- other: Std dev not specified
- Percentile:
- other: 8%
- Mean:
- < 10 µm
- Remarks on result:
- other: Std dev not specified
- Percentile:
- other: 1.2%
- Mean:
- < 4 µm
- Remarks on result:
- other: Std dev not specified
- Conclusions:
- 98.5 % present as < 100 µm, 8 % present as < 10 µm, 1.2 % present as < 4 µm.
D(v0.5) 9.98 µm - Executive summary:
The particle size distribution for the substance (coarse specification, 99-100 % < 150 µm) has been determined by dry and wet laser diffraction according to ISO 13320:2020. The median particle size D(v0.5) was found to be 27.0 µm . The % fractions were as follows: 98.5 % present as < 100 µm, 8 % present as < 10 µm, 1.2 % present as < 4 µm.
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 22 April 2022
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Deviations:
- not specified
- Principles of method if other than guideline:
- Particle size measurement reports according to Hunstman specifications which are comparable to standard guidelines.
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Percentile:
- D90
- Mean:
- >= 22.5 µm
- Percentile:
- D50
- Mean:
- >= 9.98 µm
- Percentile:
- D10
- Mean:
- >= 3.86 µm
- Percentile:
- other: 100%
- Mean:
- < 100 µm
- Remarks on result:
- other: Std dev not specified
- Percentile:
- other: 49.7%
- Mean:
- < 10 µm
- Percentile:
- other: 10.8%
- Mean:
- < 4 µm
- Conclusions:
- 100 % present as < 100 µm, 49.7 % present as < 10 µm, 10.8 % present as < 4 µm.
D(v0.5) 9.98 µm - Executive summary:
The particle size distribution for the substance (micronized specification, 95-100 % < 50 µm) has been determined by wet laser diffraction according to ISO 13320:2020. The median particle size D(v0.5) was found to be 9.98 µm . The % fractions were as follows: 100 % present as < 100 µm, 49.7 % present as < 10 µm, 10.8 % present as < 4 µm.
Referenceopen allclose all
Particle size limit |
% fraction |
|
< 100 µm |
98.5% |
|
< 10 µm |
8% |
|
< 4 µm |
1.2% |
|
Particle size limit |
% fraction |
|
< 100 µm |
100% |
|
< 10 µm |
49.7% |
|
< 4 µm |
10.8% |
|
Description of key information
The diameter of 4,4'-DDS particles for the lowest specification ranges from 0.991 µm to 51.8 µm with the following particles size distribution : D(10) = 3.86 µm, D(50) = 9.98 µm, D(90) = 22.5 µm.
The weighted mean diameter by volumne is D[4, 3] = 11.9 µm
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.
