Registration Dossier

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:
other: fine dust
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium methyl sulfate
Cas Number:
377734-55-9
Molecular formula:
C14H19NO5S
IUPAC Name:
7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium methyl sulfate
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
Note in the report (7-Hydroxy-2-naphthyl)-trimethylammonium methyl sulphate (NBTRI) is referred to as EGB12-10-1 NBTRI

Results and discussion

Mass median aerodynamic diameter:
235 µm
Particle size
Key result
Percentile:
other: median
Mean:
235 µm
St. dev.:
0
Remarks on result:
other: Standard deviation not reported
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
> 400 µm
Distribution:
31.6 %
No.:
#2
Size:
< 400 µm
Distribution:
67.6 %
No.:
#3
Size:
< 300 µm
Distribution:
58.1 %
No.:
#4
Size:
< 200 µm
Distribution:
43.1 %
No.:
#5
Size:
< 100 µm
Distribution:
10.9 %
No.:
#6
Size:
< 50 µm
Distribution:
0.6 %

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 of (7-Hydroxy-2-naphthyl)-trimethylammonium methyl sulphate was calculated to be 235µm based on a sieve analysis ranging from <50µm to >400µm.
Executive summary:

Median particle size of (7-Hydroxy-2-naphthyl)-trimethylammonium methyl sulphate was calculated to be 235µm based on a sieve analysis ranging from <50µm to >400µm.