4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]diphenol; bisphenol AF

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:

09 August 2017 - 01 December 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 187

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Mass median aerodynamic diameter:

>= 13.896 - <= 14.031 µm

Geometric standard deviation:

0.14

Percentile:

D10

Mean:

4.4 µm

St. dev.:

0.11

Remarks on result:

other: Mean values of two determinations reported.

Key result

Percentile:

D50

Mean:

13.96 µm

St. dev.:

0.14

Remarks on result:

other: Mean values of two determinations reported.

Percentile:

D90

Mean:

36.33 µm

St. dev.:

2.08

Remarks on result:

other: Mean values of two determinations reported.

The dispersing pressure was adjusted to 3.0 bar and the feeding rate was set to 50 %.

 

The particle size distribution was determined using the laser diffraction method with dry dispersion. The particle size distribution of the test item was determined according to CIPAC MT 187 in duplicate. Table 2 summarizes the results of the particle size distribution.

 

Table 2:          Volume Based Particle Size Distribution of the Test Item

Measurement	L10 D (v, 0.1)	L50 D (v, 0.5)	L90 D (v, 0.9)
	[µm]	[µm]	[µm]
1	4.346	14.031	37.367
2	4.451	13.896	35.286
Mean Value	4.40	13.96	36.33
Absolute Deviation	0.11	0.14	2.08

Conclusions:

Particle Size Distribution:
L10D (v, 0.1) = 4.40 µm,
L50D (v, 0.5) = 13.96 µm,
L90D (v, 0.9) = 36.33 µm.

Executive summary:

CIPAC MT 187 – The particle size distribution of the test item was determined utilising laser scattering diffraction.  The procedure employed was designed to be compatible with the Method 187 of Handbook K from the Collaborative International Pesticides Analytical Council.

The test item was introduced to the analyser beam (Helium-Neon Laser) by direct spraying through the measurement area using the dry powder feeder (air pressure 3 bar, feeding rate 50 %).  The particle size distribution was determined in duplicate and the average result was calculated.

The mean particle size distribution of the test item was established as being L10 D (v, 0.1) = 4.40 µm, the L50 D (v, 0.5) = 13.96 µm and the L90 D (v, 0.9) = 36.33 µm.

Description of key information

Particle Size Distribution: L10D (v, 0.1) = 4.40 µm, L50D (v, 0.5) = 13.96 µm, L90D (v, 0.9) = 36.33 µm; CIPAC MT 187; C Bär (2017)

Additional information

CIPAC MT 187 – The particle size distribution of the test item was determined utilising laser scattering diffraction.  The procedure employed was designed to be compatible with the Method 187 of Handbook K from the Collaborative International Pesticides Analytical Council.

The test item was introduced to the analyser beam (Helium-Neon Laser) by direct spraying through the measurement area using the dry powder feeder (air pressure 3 bar, feeding rate 50 %).  The particle size distribution was determined in duplicate and the average result was calculated.

The mean particle size distribution of the test item was established as being L10 D (v, 0.1) = 4.40 µm, the L50 D (v, 0.5) = 13.96 µm and the L90 D (v, 0.9) = 36.33 µm.