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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:
2017-04 - 2017-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose:
reference to same study
Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-04 - 2017-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
not specified
Type of method:
pycnometer method
Specific details on test material used for the study:
TEST SUBSTANCE: CYASORB® UV-24 Light Absorber
Main component: 2,2`-Dihydroxy-4-methoxybenzophenone CAS# 131-53-3
Molecular formula C14H12O4
Molecular Weight: 244.24 g/mol
Appearance: yellow powder
Type:
density
Density:
1.39 g/cm³
Temp.:
22.7 °C
Type:
relative density
Density:
1.39
Temp.:
22.7 °C

Summary of Density Results, specimen weights, and room temperature during analysis.

Test Substance Specimen No.

Average Density (g/mL)

S.D.

Initial specimen wt (g)

Final sample weight (g)

Temperature (°C)

1

1.3886

0.0008

4.5107

4.5106

22.7

2

1.3887

0.0006

4.7798

4.7798

22.7

Conclusions:
The density of the test item is 1.39 g/cm³ at room temperature.
Executive summary:

The density of 2,2'-Dihydroxy-4 -methoxybenzophenone is 1.39 g/cm³ at 22.7 °C.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions
GLP compliance:
not specified
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
TEST SUBSTANCE: CYASORB® UV-24 Light Absorber
Main component: 2,2`-Dihydroxy-4-methoxybenzophenone CAS# 131-53-3
Molecular formula C14H12O4
Molecular Weight: 244.24 g/mol
Appearance: yellow powder

Results and discussion

Particle sizeopen allclose all
Percentile:
D10
Mean:
54 µm
St. dev.:
0.7
Percentile:
D50
Mean:
95.5 µm
St. dev.:
3.5
Percentile:
D90
Mean:
451.5 µm
St. dev.:
24.7

Any other information on results incl. tables

Primarily rectangular shaped particles with the bulk ranging 50 to 1,000 microns

Particle size Summary from Horiba Analysis

Run Number

Average

Median

10thpercentile

90thPercentile

Run 1

176

98

55

434

Run 2

179

93

53

469

Applicant's summary and conclusion

Conclusions:
The test item is primarily constituted of rectangular shaped particles with the bulk ranging 50 to 1,000 microns. D50 = 95.5 µm.
Executive summary:

2,2 -Dihydroxy-4 -methoxybenzophenone is primarily constituted of rectangular shaped particles with the bulk ranging 50 to 1,000 microns. D50 = 95.5 µm.