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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
for particles <500 µm
Principles of method if other than guideline:
for particles >500 µm: sieving by vibration
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Remarks:
+ sieving by vibration
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
2,3,5-trimethylhydroquinone
EC Number:
211-838-3
EC Name:
2,3,5-trimethylhydroquinone
Cas Number:
700-13-0
Molecular formula:
C9H12O2
IUPAC Name:
2,3,5-trimethylhydroquinone
Test material form:
solid: particulate/powder
Details on test material:
Name of test material (as cited in study report): TMH

Results and discussion

Particle sizeopen allclose all
Key result
Percentile:
D50
Mean:
ca. 100 µm
Remarks on result:
other: St. dev. not stated
Key result
Percentile:
D10
Mean:
ca. 30 µm
Remarks on result:
other: St. dev. not stated
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
< 10 000 µm
Distribution:
>= 95 - <= 100 %
No.:
#2
Size:
< 1 000 µm
Distribution:
>= 72 - <= 92 %
No.:
#3
Size:
< 100 µm
Distribution:
>= 42 - <= 62 %
No.:
#4
Size:
< 10 µm
Distribution:
>= 1 - <= 3 %
No.:
#5
Size:
< 4 µm
Distribution:
0 %

Applicant's summary and conclusion

Conclusions:
Trimethylhydroquinone has a median particle size D50 of approx.100 µm.
Executive summary:

Different samples of trimethylhydroquinone were analysed via sieving and laser diffraction with the result that the particle size distribution lies between 5 and 10 000 µm. The median particle size D50 is estimated to be 100 µm.