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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
GLP compliance:
no
Type of method:
microscopic examination
Type of distribution:
counted distribution
Mass median aerodynamic diameter:
73.45 µm
Percentile:
D50
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.

Result: Sieve Fraction (<100¿m):

weighted sample: 0,9832 g

weight fraction <100 ¿m: 0,0316 g

mass fraction <100 ¿m: 3,21 %

Result: Particle Size Distribution for sieve fraction nominal < 100 µm

99.43%: 5 - 100 µm

0.57%: > 100 µm

Statistical Data:

 Counts  1051  
   Mean diameter [¿m]  Aspect Ratio
 Minimum  16.11  1.05
 Maximum  104.05  8.93
Arithmetic mean  47.84  1.57 
 Median  43.81  1.48
 Standard deviation  19.51  0.44

Result: Mass Fraction (calculated) for sieve fraction nominal < 100 µm:

100%: 10 - 100 µm (inhalable)

 Particle Size  Spherical Volume [%]  Cubical Volume [%]
 <4 ¿m (respirable) 0.0 0.0 
 4-10 ¿m (thoracic) 0.0  0.0
 10-100 ¿m (inhalable) 100.0 100.0
 >100 ¿m 0.0 0.0 
 Median (diameter ¿m)  73.45  74.36

Conclusion:

 Accounting based on the total sample weight    
   Particle Size [¿m]  Spherical Volume [%]
 Mass Fraction  >100  96.79
 Sieve Fraction  >100  0.0
 Total (>100¿m)    96.79
 Sieve Fraction  10-100 (inhalable)  3.21
 Sieve Fraction  4-10 (thoracic)  0.0
 Sieve Fraction  <4 (respirable)  0.0
Conclusions:
The MMAD (Mass Median Aerodynamic Diameter < 100µm) of the substance has a value of 73.45 µm as spherical particles.
Executive summary:

The MMAD (Mass Median Aerodynamic Diameter < 100µm) of the substance was determined according the OECD Guideline 110 has a value of 73.45 µm as spherical particles.

Description of key information

The MMAD (Mass Median Aerodynamic Diameter < 100 µm) of the substance was determined according the OECD Guideline 110 has a value of 73.45 ¿m as spherical particles.

Additional information