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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Collaborative International Pesticides Analytical Council Handbook, MT 59, Sieve Analysis
Deviations:
no
GLP compliance:
yes
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
N,N,N',N',N'',N''-hexamethyl-4,4',4''-methylidynetrianiline
EC Number:
210-043-9
EC Name:
N,N,N',N',N'',N''-hexamethyl-4,4',4''-methylidynetrianiline
Cas Number:
603-48-5
Molecular formula:
C25H31N3
IUPAC Name:
4-{bis[4-(dimethylamino)phenyl]methyl}-N,N-dimethylaniline
Test material form:
solid: particulate/powder
Details on test material:
- Purity: 99.4%

Results and discussion

Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
710 µm
Distribution:
0.2 %
No.:
#2
Size:
500 µm
Distribution:
1 %
No.:
#3
Size:
355 µm
Distribution:
3 %
No.:
#4
Size:
250 µm
Distribution:
9.4 %
No.:
#6
Size:
180 µm
Distribution:
16.6 %
No.:
#7
Size:
125 µm
Distribution:
28.4 %
No.:
#8
Size:
90 µm
Distribution:
17.6 %
No.:
#9
Size:
63 µm
Distribution:
16.5 %
No.:
#10
Size:
<= 45 µm
Distribution:
6.7 %

Applicant's summary and conclusion

Conclusions:
The average amount of particulate matter either at or larger than 250 microns in the test substance was approximately 14%. The average amount of particulate matter smaller than 250 microns in the test substance was approximately 86%. The average amount of particulate matter smaller than 20.0 microns in the test substance was negligible. The mean weight percent recovery for the two analyses was 99.4%.
Executive summary:

The particle size distribution of the test substance was determined using dry sieve analysis for powder material in accordance with OECD Guideline 110. Sieve analysis consisted of the quantitative separation of a powder or granular material into fractions with different ranges of particle size by use of an appropriate sieve or sieves. The dry sieve was performed by a process of shaking, tapping, brushing and weighing. The test was performed using a total of eleven test sieves with nominal aperture sizes ranging from 20 to 710 μm (micron) and a collection pan.

The average amount of particulate matter either at or larger than 250 microns in the test substance was approximately 14%. The average amount of particulate matter smaller than 250 microns in the test substance was approximately 86%. The average amount of particulate matter smaller than 20.0 microns in the test substance was negligible. The mean weight percent recovery for the two analyses was 99.4%.