N,N-Bis-(4-biphenyl)amine

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:

September 27 ,2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions

Deviations:

no

GLP compliance:

no

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Percentile:

D10

Mean:

10.2 µm

St. dev.:

0.14

Key result

Percentile:

D50

Mean:

91.2 µm

St. dev.:

1.48

Percentile:

D90

Mean:

383 µm

St. dev.:

70

The test item consisted of transparent irregular shaped particles. After adjusting the laser, measuring the background and adjusting the correct particle concentration (obscuration) the measurement was started. The control software automatically performed three measurements. The average of these three measurements was given as result. Two test series of three measurements each were performed. The measurement time was 1 s.

The median particle size D50: 50 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:

1st test series: D50 = 90.1 µm

2nd test series: D50 = 92.2.6 µm

The average of the median particle size D50 is 91.2 µm.

 

The particle size D10: 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:

1st test series: D10 = 10.3 µm

2nd test series: D10= 10.1 µm

 

The average of the particle size D10 is 10.2 µm.

 

The particle size D90: 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions are:

1st test series: D90 = 333 µm

2nd test series: D90 = 432 µm

The average of the particle size D90 = 383 µm.

 

The measurements showed a maximum at approximately 100 µm and 200 µm. Additionally, a second maximum was observed between 1000 µm and 2000 µm and a shoulder was observed at approximately 3 µm.

Conclusions:

The median particle size D50 of the test item deduced from the particle size distributions was determined to be 91.2 µm.

Executive summary:

A study was conducted according to OECD TG 110, OPPTS 830.7520 and ISO 13320 in order to determine the particle size distribution of the test item. The particle size distribution was determined using laser diffraction. Two test series of 3 measurements each were performed with the test item.The maximum was observed between 100 µm and 200 µm. Additionally, a second maximum was observed between 1000 µm and 2000 µm and a shoulder was observed at approximately 3 µm.The median particle size D50 of the test item was determined to be 91.2 µm. The particle size D10 of the test item was determined to be 10.2 µm and the D90 was determined to be 383 µm, respectively.

Description of key information

The median particle size D50 of the test item deduced from the particle size distributions was determined to be 91.2 µm (reference 4.5 -1).

Additional information

A study was conducted according to OECD TG 110, OPPTS 830.7520 and ISO 13320 in order to determine the particle size distribution of the test item. The particle size distribution was determined using laser diffraction. Two test series of 3 measurements each were performed with the test item. The maximum was observed between 100 µm and 200 µm. Additionally, a second maximum was observed between 1000 µm and 2000 µm and a shoulder was observed at approximately 3 µm. The median particle size D50 of the test item was determined to be 91.2 µm. The particle size D10 of the test item was determined to be 10.2 µm and the D90 was determined to be 383 µm, respectively.