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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:
01 June 2017 to 06 July 2017
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

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

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Particle size analyses were carried out on the materials using sieve analysis and calculation of the median
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
sieving
Type of particle tested:
agglomerate
Type of distribution:
volumetric distribution

Test material

Constituent 1
Reference substance name:
602-259-0
Cas Number:
12222-74-1
IUPAC Name:
602-259-0
Test material form:
solid: particulate/powder
Details on test material:
Test material from Sensient UK, various batches, see individual endpoint for specifics.
Specific details on test material used for the study:
Note in the report 1(4H)-Naphthalenone, 8-aminodibromo-5-hydroxy-4-imino (DBN) is referred to as DBN INT 000101
Samples originate from Sesient Colours UK Ltd.
Samples received at test centre 11May2017

Results and discussion

Mass median aerodynamic diameter:
204 µm
Particle size
Key result
Percentile:
other: median
Mean:
204 µm
St. dev.:
0
Remarks on result:
other: Standard deviation not specified
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
< 300 µm
Distribution:
47.2 %
No.:
#2
Size:
< 200 µm
Distribution:
48.4 %
No.:
#3
Size:
< 100 µm
Distribution:
16.6 %
No.:
#4
Size:
< 50 µm
Distribution:
2.8 %

Any other information on results incl. tables

See attached report, page 4 for complete breakdown of particle sizes used to calculate median.

Applicant's summary and conclusion

Conclusions:
Median particle size was calculated to be 204µm based on a sieve analysis ranging from <50µm to >400µm.
Executive summary:

Median particle size was calculated to be 204µm based on a sieve analysis ranging from <50µm to >400µm.