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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:
2014-10-28 to 2015-01-19
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study report

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report date:
2015

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of distribution:
counted distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
L-threonine
EC Number:
200-774-1
EC Name:
L-threonine
Cas Number:
72-19-5
Molecular formula:
C4H9NO3
IUPAC Name:
L-threonine

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
141.4 µm
Remarks on result:
other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Percentile:
D10
Mean:
34.77 µm
St. dev.:
0.53
Remarks on result:
other: three measurements performed
Percentile:
D50
Mean:
117.5 µm
St. dev.:
1.85
Remarks on result:
other: three measurements performed
Percentile:
D90
Mean:
117.5 µm
St. dev.:
4.8
Remarks on result:
other: three measurements performed

Any other information on results incl. tables

The particle size distribution (volume distribution) of the test item in an air stream was measured by laser diffraction.

Applicant's summary and conclusion

Conclusions:
The particle size distribution (volume distribution) of the test item in an air stream was measured by laser diffraction.
The average of three measurements is:
d10: 34.77 µm
d50: 117.5 µm
d90: 241.2 µm
dmean: 141.41 µm