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EC number: 207-312-8 | CAS number: 461-58-5
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:
- October 2009
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320-1
- Principles of method if other than guideline:
- Laser diffraction method - The test was conducted according to the guidance of the apparatus used. A short description is given below:
The dry test substance is dispersed and passes a laser in form of an aerosol. In dependence on the particle size the laser is diffracted. The resulting so called “Fraunhofer” diffraction spectrum is bundled using a converging lens in a multi-element photo detector. In dependence of the particle size distribution a radial symmetric intensity distribution is generated. The measured intensity is analysed by a computer and converted into a particle size distribution. - GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Percentile:
- D50
- Mean:
- 1.65 µm
- Remarks on result:
- other: SD not determined.
- No.:
- #1
- Size:
- 0.69 µm
- Distribution:
- 10 %
- No.:
- #2
- Size:
- 1.65 µm
- Distribution:
- 50 %
- No.:
- #3
- Size:
- 3.64 µm
- Distribution:
- 90 %
- No.:
- #4
- Size:
- 7.5 µm
- Distribution:
- 100 %
- Conclusions:
- The median value of particle size is 1.65 µm.
- Executive summary:
The granulometric properties of dicyandiamide were analysed with the laser diffraction method according to guideline ISO 13320-1. The particle size distribution was determined using the particle size analysator HELOS KF (H0119) from Sympatec with a Sympatec RODOS dry dispersing unit. The test material was dried via dispersing and run in form of an aerosol fluent through a laser beam. The median value of particle size is 1.65µm.
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- January 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320-1
- Principles of method if other than guideline:
- Laser diffraction method
The dry test substance is dispersed and passes a laser in form of an aerosol. In dependence on the particle size the laser is diffracted. The resulting so called “Fraunhofer” diffraction spectrum is bundled using a converging lens in a multi-element photo detector. In dependence of the particle size distribution a radial symmetric intensity distribution is generated. The measured intensity is analysed by a computer and converted into a particle size distribution. - GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Key result
- Percentile:
- D50
- Mean:
- 1.65 µm
- Remarks on result:
- other: SD not reported.
- Conclusions:
- The median value of particle size is 1.65 µm.
- Executive summary:
The study was conducted according to national standard method ISO 13320 -1. An appropriate apparatus was used, the HELOS KF (H0119) from Sympatec with a Sympatec RODOS dry dispersing unit. The median value of particle size of Dyhard 100 SF has been determined to be 1,65µm. The particle sizes are within a range of 0,69µm for x10 and 3.64µm for x90 with the largest value being 7.5µm for x100.
Referenceopen allclose all
The results are shown in graphical and tabular form in the attached background material.
The results are shown in graphical and tabular form in the attached background material.
Description of key information
The particle sizes were determined with the laser diffraction method (apparatus HELOS KF H0119) according
to guideline ISO 13320-1.
Additional information
The granulometric properties of dicyandiamide were analysed with the laser diffraction method according to guideline ISO 13320-1. The method is described in a separate document. The particle size distribution was determined using the particle size analysator HELOS KF (H0119) from Sympatec with a Sympatec RODOS dry dispersing unit. The test material was dried via dispersing and run in form of an aerosol fluent through a laser beam. The median value of particle size is 1.65µm.
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