Calcium acetylide

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Principles of method if other than guideline:

Laser diffraction method - The test was conducted according to the guidance of the apparatus used. A short description is given below:
The dry test substance is dispersed and passes a laser in form of an aerosol. In dependence on the particle size the laser is diffracted. The resulting so called “Fraunhofer” diffraction spectrum is bundled using a converging lens in a multi-element photo detector. In dependence of the particle size distribution a radial symmetric intensity distribution is generated. The measured intensity is analysed by a computer and converted into a particle size distribution.
The test substance was analysed three times, mean values are reported in this section.

GLP compliance:

not specified

Type of method:

Laser scattering/diffraction

Type of distribution:

volumetric distribution

Key result

Percentile:

D50

Mean:

30.11 µm

Remarks on result:

other: SD not reported

Key result

Percentile:

D10

Mean:

4.5 µm

Remarks on result:

other: SD not reported

Percentile:

D90

Mean:

124.72 µm

Remarks on result:

other: SD not reported

Percentile:

D99

Mean:

406.718 µm

Remarks on result:

other: SD not reported

Sample 1

SMD = 14.15 µm

VMD = 50.28 µm

Sv = 0.42 m²/cm³

Sm = <E06>

x10 = 4.48 µm

x16 = 6.86 µm

x50 = 30.05 µm

x90 = 124.86 µm

x98 = 212,91 µm

x100 = 360 µm

Sample 2

SMD = 14.12 µm

VMD = 50.35 µm

Sv = 0.43 m²/cm³

Sm = <E06>

x10 = 4.47 µm

x16 = 6.85 µm

x50 = 29.80 µm

x90 = 124.28 µm

x98 = 222,32 µm

x100 = 430 µm

Sample 3

SMD = 14.30 µm

VMD = 50.89 µm

Sv = 0.42 m²/cm³

Sm = <E06>

x10 = 4.54 µm

x16 = 6.96 µm

x50 = 30.48 µm

x90 = 125.02 µm

x98 = 221,32 µm

x100 = 430 µm

Conclusions:

Granulometry was determined in a reliable study conducted according to generally accepted scientific principles. Three samples of the test substance were analysed. A mean median value D50 of 30.11 µm was determined by laser diffraction.

Executive summary:

The granulometric properties of three samples of calcium carbide (batch T-008201) were analysed with the laser diffraction method. The resulting mean median value (D50) obtained by laser diffraction is 30.11 µm. The mean D10 value was determined to be 4.50 µm.

Description of key information

Granulometry of different samples of calcium carbide was determined by laser diffraction.

The average (n=3) median particle size (D50) obtained by laser diffraction is 30.11 µm.

Additional information

Granulometry of three samples of calcium carbide (batch T-008201) was determined by laser diffraction.

The average (n=3) median particle size (D50) obtained by laser diffraction is 30.11 µm. The average D10 value was determined to be 4.50 µm.