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:
01.01.2015 to 31.08.2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: in compliance w ith ISO 17025 and ISO 9001

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Laser scattering/diffraction method (CILAS), which is commonly used for inorganic powdery substances.
GLP compliance:
no
Remarks:
test methord accreditated
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
mass based distribution

Test material

Constituent 1
Reference substance name:
Calcium hydrosilicate, reaction product of natural quartz sand and technical lime by a hydrothermal and tribochemical process
EC Number:
946-103-2
IUPAC Name:
Calcium hydrosilicate, reaction product of natural quartz sand and technical lime by a hydrothermal and tribochemical process
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): Celitement
- Chemical name: Calcium hydrosilicate
- Physical state: White powder
- pH-value: 10.5
- Expiration date of the lot/batch: 12/2015
- Stability under test conditions: Hydration reaction with water
- Storage condition of test material: Room temperature protected from light, in original container in evacuated desiccator

Results and discussion

Mass median aerodynamic diameter:
ca. 16 µm
Geometric standard deviation:
ca. 5.74
Particle sizeopen allclose all
Percentile:
D50
Mean:
> 1 - < 70 µm
Remarks on result:
other: 80 % of the particles are covered by this particle size range (migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Percentile:
D10
Mean:
ca. 1 µm
St. dev.:
0.1
Percentile:
D50
Mean:
ca. 16 µm
St. dev.:
1
Percentile:
D90
Mean:
ca. 72 µm
St. dev.:
1.5

Any other information on results incl. tables

location parameter of RRSB x' = 23.71 µm

slope of RRSB n = 0.68

Applicant's summary and conclusion

Conclusions:
Celitement consists of fine particles in a range betw een 0 and 175 µm. About 80 % of the particles are in the range betw een 1.1 and 72 µm.
The respirable fraction comprises about 22 %.