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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:
12.02.2018 - 12.02.2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
42 µm
Geometric standard deviation:
3.2
Key result
Percentile:
D10
Mean:
6.1 µm
St. dev.:
0.04
Key result
Percentile:
D50
Mean:
36 µm
St. dev.:
0.01
Key result
Percentile:
D90
Mean:
121.7 µm
St. dev.:
0.36

Two test series of 3 measurements each were performed with the test item.

 

Test series 1:

D10:      6.1 µm                                                         Standard deviation: 0.14 µm

D50:      36.0 µm         (Median diameter)                 Standard deviation: 0.27 µm

D90:      121.3 µm                                                      Standard deviation: 1.18 µm

Test series 2:

D10:      6.1 µm                                                        Standard deviation: 0.03 µm

D50:      36.0 µm         (Median diameter)                 Standard deviation: 0.31 µm

D90:      122.0 µm                                                      Standard deviation: 0.37 µm

Average

D10:      6.1 µm                                                        Standard deviation: 0.04 µm

D50:      36.0 µm         (Median diameter)                 Standard deviation: < 0.01 µm

D90:      121.7 µm                                                      Standard deviation: 0.36 µm

Conclusions:
Methylhydroquinone has a median particle size of D50 = 36 µm.
Executive summary:

The test item Methylhydroquinone has a median particle size of D50 = 36 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981) and ISO 13320 (2009).

Description of key information

The test item Methylhydroquinone has a median particle size of D50 = 36 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981) and ISO 13320 (2009).

Additional information