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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
1,2,4-triazole-3-thiol
EC Number:
221-656-6
EC Name:
1,2,4-triazole-3-thiol
Cas Number:
3179-31-5
Molecular formula:
C2H3N3S
IUPAC Name:
4H-1,2,4-triazole-3-thiol
Test material form:
solid: crystalline

Results and discussion

Particle size
Key result
Percentile:
D50
Mean:
253.5 µm
St. dev.:
8.17

Any other information on results incl. tables

Test series 1:

D10:       51.5 µm                                                       Standard deviation: 1.42 µm

D50:       261.7 µm       (Median diameter)                Standard deviation: 11.90 µm

D90:       670.5 µm                                                     Standard deviation: 38.19 µm

 

Test series 2:

D10:       49.0 µm                                                       Standard deviation: 0.56 µm

D50:       245.3 µm       (Median diameter)                Standard deviation: 3.39 µm

D90:       647.1 µm                                                     Standard deviation: 13.39 µm

Average

D10:       50.3 µm                                                       Standard deviation: 1.26 µm

D50:       253.5 µm       (Median diameter)                Standard deviation: 8.17 µm

D90:       658.8 µm                                                      Standard deviation: 11.69 µm

Applicant's summary and conclusion

Conclusions:
The test item 3-Mercapto-1,2,4-triazole has a median particle size of D50 = 253.5 µm, which was determined by laser diffraction measurement according to OECD Test Guideline 110 (1981) and ISO 13320 (2009).