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Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
2009
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Version / remarks:
1981
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Version / remarks:
1996
Deviations:
no
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Specific details on test material used for the study:
Test Item: sodium 3-sulfobenzoate
Composition: sodium 3-sulfobenzoate
Batch No.: 170103
CAS No.: 17625-03-5
EINECS No.: 241-602-5
Molecular formula: C7H5SO5Na
Molecular weight: 224.17 g/mol
Density: 1.7915 g/cm3 (Standard deviation: 0.0003)
Appearance: White crystalline powder
Purity: > 99.0 % (Titration with NaOH, Glass indicating electrode, Colomel reference electrode)
Storage conditions: Room temperature (20 ± 5°C), keep away from humidity
Production date: Year 2017
Expiry date: 2019-02-14
Mass median aerodynamic diameter:
55.1 µm
Percentile:
D10
Mean:
6.3 µm
Remarks on result:
other: test series 1
Percentile:
D50
Mean:
40.5 µm
St. dev.:
0.09
Remarks on result:
other: test series 1
Percentile:
D90
Mean:
367.3 µm
Remarks on result:
other: test series 1
Percentile:
D10
Mean:
6.5 µm
Remarks on result:
other: test series 2
Percentile:
D50
Mean:
41.8 µm
St. dev.:
0.648
Remarks on result:
other: test series 2
Percentile:
D90
Mean:
369.4 µm
Remarks on result:
other: test series 2

Two test series of 3 measurements each were performed with the test item.

Test series 1:

D10: 6.3 μm

D50: 40.5 μm (Median diameter) Standard deviation: 0.09

D90: 367.3 μm

Test series 2:

D10: 6.5 μm

D50: 41.8 μm (Median diameter) Standard deviation: 0.648

D90: 371.5 μm

Average

D10: 6.4 μm

D50: 41.1 μm (Median diameter) Standard deviation: 0.62

D90: 369.4 μm

The test item sodium 3-sulfobenzoate has a volume median diameter (VMD) of D50 = 41.1 μm, which has been determined by laser diffraction measurement and a MMAD of 55.1 μm.

Conclusions:
The test item sodium 3-sulfobenzoate has a volume median diameter (VMD) of D50 = 41 .1 μm, which was determined by laser diffraction measurement and a MMAD of 55.1 μm.
Executive summary:

Particle size distribution of sodium 3-sulfobenzoate has been determined according to OECD Guideline 110 and EPA OCSPP Test Guideline 830.7520. The test item sodium 3-sulfobenzoate has had a volume median diameter (VMD) of D50 = 41 .1 μm, which has been determined by laser diffraction measurement and a MMAD of 55.1 μm.

Description of key information

Particle size distribution of sodium 3-sulfobenzoate has been determined according to OECD Guideline 110 and EPA OCSPP Test Guideline 830.7520. The test item sodium 3-sulfobenzoate has had a volume median diameter (VMD) of D50 = 41 .1 μm, which has been determined by laser diffraction measurement and a MMAD of 55.1 μm.

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