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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Remarks:
The study was well documented and meets generally accepted scientific principles, but was not conducted in compliance with GLP.
Qualifier:
no guideline followed
Principles of method if other than guideline:
The specified guidelines are only applicable to water insoluble substances. The particle size distribution was determined using seive analysis and laser diffraction.
GLP compliance:
no
Type of method:
other: Sieving and laser diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Percentile:
D10
Mean:
4.12 µm
Remarks on result:
other: No data on standard deviation
Percentile:
D50
Mean:
31.9 µm
Remarks on result:
other: No data on standard deviation
Percentile:
D90
Mean:
132.15 µm
Remarks on result:
other: No data on standard deviation
Percentile:
D99
Mean:
291.1 µm
Remarks on result:
other: No data on standard deviation
No.:
#1
Size:
0.4 mm
Distribution:
0 %
No.:
#2
Size:
0.18 mm
Distribution:
1.6 %
No.:
#3
Size:
0.1 mm
Distribution:
15.9 %

The particle size distribution at different passages was measured by seive analysis. The particle size results were measured by laser diffraction for the fraction below 100 µm.

Sauter Mean Diameter, SMD = 11.83 µm

Volume Mean Diameter, VMD = 53.53 µm

Surface area per unit volume = 0.51 m2/cm3

Conclusions:
The particle size of the finest commercially available powder grade citric acid anhydrous was determined in a reliable study conducted according to generally accepted scientific principles. The fraction below 100 µm was 84.1%; the D50 of the fraction below 100 µm was at 31.99 µm.

Description of key information

Particle size: The fraction below 100 µm was 84.1%; the D50 of the fraction below 100 µm was at 31.99 µm.

Additional information

A single reliable study is available for the particle size distribution of citric acid anhydrous. This study is considered sufficient to fulfil the information requirements of this endpoint. The particle size of the finest powder grade citric acid anhydrous was determined in a reliable study conducted according to generally accepted scientific principles. The fraction below 100 µm was 84.1%; the D50 of the fraction below 100 µm was at 31.99 µm.