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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
May 2018
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
sieving
GLP compliance:
no
Type of method:
sieving
Type of particle tested:
other: not specified
Type of distribution:
mass based distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
Cholest-5-en-3-β-yl acetate
EC Number:
210-066-4
EC Name:
Cholest-5-en-3-β-yl acetate
Cas Number:
604-35-3
Molecular formula:
C29H48O2
IUPAC Name:
(1R,3aS,3bS,7S,9aR,9bS,11aR)-9a,11a-dimethyl-1-[(2R)-6-methylheptan-2-yl]-1H,2H,3H,3aH,3bH,4H,6H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-7-yl acetate
Test material form:
solid: particulate/powder
Details on test material:
- Appearance: White crystalline powder
- Storage condition: At room temperature

Results and discussion

Remarks on result:
not measured/tested
Particle size distribution at different passagesopen allclose all
Size:
< 1 000 µm
Distribution:
67 other: wt%
Remarks on result:
other: D67=1000 µm
Size:
< 500 µm
Distribution:
25 other: wt%
Remarks on result:
other: D25= 500 µm
Size:
< 250 µm
Distribution:
20 other: wt%
Remarks on result:
other: D20= 250 µm

Any other information on results incl. tables

From the measurements it can be concluded that:

33% (w/w) of the substance has particles > 1000 µm;

42% (w/w) of the substance has particles in the range 500-1000 µm;

5% (w/w) of the substance has particles in the range 250-500 µm;

20% (w/w) of the substance has particles < 250 µm.

Applicant's summary and conclusion

Conclusions:
Particle size distribution of the substance: D67=1000 µm, D25= 500 µm and D20= 250 µm. 33% (w/w) of the substance has particles > 1000 µm. The amount of substance with particles < 100 µm is max. 20% (w/w).