reaction product of alumina and sulfuric acid

Particle size distribution (Granulometry)

Administrative data

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:

test procedure in accordance with national standard methods

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: ISO 13320:2009 Particle size analysis by Laser diffraction

GLP compliance:

yes

Type of method:

Laser scattering/diffraction

Type of distribution:

volumetric distribution

Test material

Test material information

Constituent 1

Reference substance name:

reaction product of alumina and sulfuric acid

EC Number:

812-508-7

Cas Number:

1093112-19-6

Molecular formula:

unspecified, UVCB substance

IUPAC Name:

reaction product of alumina and sulfuric acid

Test material form:

solid: particulate/powder

Results and discussion

Mass median aerodynamic diameter:

90 µm

Geometric standard deviation:

18

Particle size

Particle size 1

Key result

Percentile:

D50

Mean:

90 µm

St. dev.:

20

Remarks on result:

other: Median diameter is equivalent to MMAD(migrated from fields under 'Mass median diameter' as D50 percentile.

Particle size 2

Key result

Percentile:

D90

Mean:

145 µm

St. dev.:

12.5

Particle size 3

Key result

Percentile:

D10

Mean:

40 µm

St. dev.:

7.5

Applicant's summary and conclusion

Conclusions:

Test item shows a particle size distribution of d10= 40 µm, d50 = 90 µm and d90 = 145 µm.
The mass median aerodynamic diameter (MMAD) of the test item is calculated as ca. 90 µm (D50).