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EC number: 203-674-6 | CAS number: 109-46-6
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:
- 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
- Version / remarks:
- sieving
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM C136
- Qualifier:
- according to guideline
- Guideline:
- other: AASHTO T 27
- GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
- Type of method:
- sieving
- Type of particle tested:
- primary particle
- Type of distribution:
- other: sieving
- Mass median aerodynamic diameter:
- ca. 20 µm
- Remarks on result:
- other: standard deviation not measured -- no statitisc values
- Percentile:
- D10
- Mean:
- ca. 20 µm
- Remarks on result:
- other: St deviation not known
- Percentile:
- D50
- Mean:
- ca. 60 µm
- Remarks on result:
- other: St deviation not known
- Percentile:
- D90
- Mean:
- 460 µm
- Remarks on result:
- other: st deviation not known
- No.:
- #1
- Size:
- >= 1 000 µm
- Distribution:
- ca. 1.2 %
- No.:
- #2
- Size:
- >= 500 - < 1 000 µm
- Distribution:
- ca. 12.8 %
- No.:
- #3
- Size:
- >= 250 - < 500 µm
- Distribution:
- ca. 12.4 %
- No.:
- #4
- Size:
- >= 160 - < 250 µm
- Distribution:
- ca. 2.8 %
- No.:
- #5
- Size:
- >= 63 - < 160 µm
- Distribution:
- ca. 28 %
- No.:
- #6
- Size:
- >= 40 - < 63 µm
- Distribution:
- ca. 36 %
- No.:
- #7
- Size:
- > 40 µm
- Distribution:
- ca. 6.8 %
- Conclusions:
- According to a granulometry study (sieving) OECD 110, the mean diameter of DBTU is about 60 um, D10 equals 20 um and D90um is 460 um
Since the inhalable fraction is 42.8% (i.e. 428 000mg/kg >> 5000 mg/kg), DBTU is considered as having extremely fine particles.
Reference
Description of key information
According to a granulometry study (sieving) OECD 110, the mean diameter of DBTU is about 60 um, D10 equals 20 um and D90um is 460 um
Since the inhalable fraction is 42.8% (i.e. 428 000mg/kg >> 5000 mg/kg), DBTU is considered as having extremely fine particles.
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