Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2001-07-24
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:
yes
Type of method:
electrical sensing zone (e.g. Coulter) method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 9910-1010 and 9910-1058
Remarks on result:
other: please refer to "any other information on results"
No.:
#1
Size:
<= 2 µm
Distribution:
> 0.26 - < 1.5 %
No.:
#2
Size:
> 2 - <= 10 µm
Distribution:
> 2.7 - < 5.8 %
No.:
#3
Size:
> 10 - <= 200 µm
Distribution:
> 10.2 - < 18.4 %
No.:
#4
Size:
> 2 - < 200 µm
Distribution:
> 81.3 - < 88.3 %

Table 1 MMAD

 

Batch number

 

9910-1010

9910-1058

Median diameter, from volume statistics (µm)

80

64

Mass Median aerodynamic diameter (µm)

99

79

Proportion with aerodynamic diameter < 10 µm

2 %

5 %

Table 2 Coulter counter results

Particle size, equivalent spherical diameter (µm)

Volume %

9910-1010

9910-1058

≤2

0.26

1.5

≤10

2.7

5.8

≥200

18.4

10.2

2 to 200

81.3

88.3

 

Conclusions:
The particle size distribution of the test item was shown to be between 0.86 and 441 µm equivalent spherical diameter, with less than 6% of particles by volume less than 10 µm.
The proportion of particles with an aerodynamic diameter less than 10 µm is less than 5%, so there is little potential for inhalation of the dust of this material.
Executive summary:

A study was performed to determine the particle size distribution of the test item in accordance with OECD Guideline 110. The particle size distribution of two batches of the test item was shown to be between 0.86 and 441 µm equivalent spherical diameter, with less than 6% of particles by volume less than 10 µm. The proportion of particles with an aerodynamic diameter less than 10 µm is less than 5%, so there is little potential for inhalation of the dust of this material.

Description of key information

The particle size distribution of the test item was shown to be between 0.86 and 441 µm equivalent spherical diameter, with less than 6% of particles by volume less than 10 µm. The proportion of particles with an aerodynamic diameter less than 10 µm is less than 5%, so there is little potential for inhalation of the dust of this material.

Additional information

A study was performed to determine the particle size distribution of the test item in accordance with OECD Guideline 110. The particle size distribution of two batches of the test item was shown to be between 0.86 and 441 µm equivalent spherical diameter, with less than 6% of particles by volume less than 10 µm.The proportion of particles with an aerodynamic diameter less than 10 µm is less than 5%, so there is little potential for inhalation of the dust of this material.