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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
2020-09-09
Reliability:
2 (reliable with restrictions)
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Electrical sensing zone (Coulter) method.
GLP compliance:
no
Type of method:
electrical sensing zone (e.g. Coulter) method
Type of distribution:
volumetric distribution
No.:
#1
Size:
< 4 µm
Distribution:
0.66 %
No.:
#2
Size:
< 10 µm
Distribution:
1.16 %
No.:
#3
Size:
< 100 µm
Distribution:
38.86 %
No.:
#4
Size:
> 100 µm
Distribution:
61.14 %
Conclusions:
The particle size distribution of a sample of terephthalic acid typical of the Lead Registrant's commercial production was characterised by the Coulter method as follows: particles of diameter <4, <10 and <100 microns comprised 0.66%, 1.16% and 38.86%, respectively, of the sample by volume and 61.14% of the sample consisted of particles with a diameter >100 microns.

Description of key information

The particle size distribution of a sample of terephthalic acid typical of the Lead Registrant's commercial production was characterised by the Coulter method as follows: 
particles of diameter <4, <10 and <100 microns comprised 0.66%, 1.16% and 38.86%, respectively, of the sample by volume and 61.14% of the sample consisted of particles with a diameter >100 microns.

Additional information

The data provided by the Lead Registrant are compatible with other, independently collated data contributed by members of the Terephthalic Acid Sub-Group of the Polyester Monomers Consortium ( contributors anonymised, number of sources not known), whose collective particle size distribution data are described by the following envelope: 15% to 30% smaller than 50 microns, 75% to 90% in the range 40 to 350 microns.