Diammonium tartrate

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

Study period:

11-19-2015 to 11-19-2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Version / remarks:

Adoptation 2009

GLP compliance:

no

Type of method:

Laser scattering/diffraction

Type of particle tested:

other: Translucent particles of various size

Type of distribution:

volumetric distribution

Percentile:

D50

Mean:

631.4 µm

Remarks on result:

other: 2 test series were run with L50=635.1 and L50=627.7 µm.

Percentile:

D10

Mean:

241.2 µm

Remarks on result:

other: Individual results: D10=237.8 µm and D10=244.6 µm.

Percentile:

D90

Mean:

1 296.6 µm

Remarks on result:

other: Individual results: D90= 1305.7 µm and D90=1287.6 µm

No.:

#1

Size:

< 10 µm

Distribution:

0.01 %

Remarks on result:

other: In both experiments 0.01%

No.:

#2

Size:

< 50 µm

Distribution:

0.77 %

Remarks on result:

other: Individual results distribution 0.83% and 0.71%

Monomodal distribution with a maximum observed at approximately 700µm. Particles with particle sizes > 1000 µm where observed because spherical particles only were sieved out. Non-spherical particles can pass the filter even if they have a maximum elongation > 1000 µm . Furthermore for these measured particle the measured values can vary because there is a dependency of the orientation of the particles in the laser beam.

The median particle size D50 of the test item deduced from the particle size distributions was 631.4 µm.

The particle size D10 of the test item deduced from the particle size distributions was 241.2 µm.

The particle size D90 of the test item deduced from the particle size distributions was 1296.6 µm. Very small proportion (0.01%) has a particle size diameter < 10 µm.

Description of key information

D10: 241.2 µm

D50: 631.4 µm

D90: 1296.6 µm

Particle size distribution is monomodal, maximum at 700 µm, 0.01% of all particles <1 µm, 0.77% of all particles < 10 µm.

(ISO13320, Particle size analysis - Laser Diffraction Methods)

Additional information

In a study for the substance diammonium tartrate particle size distribution was determined by laser diffraction technolgy.

The study was conducted similar to guidelines CIPAC MT 187 (Particle size analysis by laser diffraction) and ISO13320: (2009: Particle Size analysis -laser diffraction methods). Due to the broad particle size distribution particles bigger than 1000 µm were sieved out. The resulting particles (82% of all particles) showed a particle size distribution that is monomodal with a maximum at 700 µm particle size. Particles bigger than 1000 µm (10% of all sieved particles have a size >1296.6 µm) were observed in the laser beam because only spherical particles with diameter >1000 µm were sieved out. Non-spherical particles having maximum elongations > 1000 µm but with minimum elongations < 1000µm can pass the filter.