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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data provided, but no report or supporting information on test procedures provided

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Principles of method if other than guideline:
Details of the guideline followed to determine the experimental result are not provided.
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction

Test material

Constituent 1
Reference substance name:
Fine unground hydrate (Sample SH500)
IUPAC Name:
Fine unground hydrate (Sample SH500)
Constituent 2
Reference substance name:
Coarse unground hydrate (Sample SH950)
IUPAC Name:
Coarse unground hydrate (Sample SH950)

Results and discussion

Particle size
Percentile:
D50
Remarks on result:
other: No source field for Standard deviation.
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
> 200 µm
Remarks on result:
other: 0-1% for fine unground hydrate; 2-5% for coarse unground hydrate
No.:
#2
Size:
< 100 µm
Remarks on result:
other: 88% for fine unground hydrate; 52-61% for coarse unground hydrate
No.:
#3
Size:
< 2 µm
Remarks on result:
other: 1.3-2% for fine unground hydrate; 1% for coarse unground hydrate

Any other information on results incl. tables

Samples of each type evaluated in duplicate

Applicant's summary and conclusion

Conclusions:
The proportion of test material having an inhalable particle size less than 100 µm was determined to be 88% for the fine unground hydrate and 52-61% for the coarse unground hydrate. The proportion of test material having a respirable particle size less than 2 µm was determined to be 1.3-2% for the fine unground hydrate and 1% for the coarse unground hydrate.