2,2'-(naphthalene-1,4-diyl)bis(benzoxazole)

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:

May 08, 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 59 Sieve Analysis

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 169 Tap Density of Water Dispersible Granules

Deviations:

no

Principles of method if other than guideline:

Sieve analysis consists of the quantitative separation of test item into fractions of different particle size ranges by using of machine sieving method.

GLP compliance:

yes (incl. QA statement)

Type of method:

sieving

Type of particle tested:

primary particle

Specific details on test material used for the study:

Test item was used in its initial form.

Mass median aerodynamic diameter:

250 - 1 000 µm

Percentile:

D50

Mean:

250 - 1 000 µm

Remarks on result:

other: sieving

DETERMINATION OF TAP DENSITY

Sample mass (W): 726 g

Sample volume after dropping (V): 182 ml

Tap density (D): 0.40 g/ml

SIEVE TEST

N. of sieves: 8

Sample mass (m, calculated): 63.9 g

Sample mass (weighed): 64.20 g

Sieve		Residue mass gx (g)	Residue rx(m/m) %	Sum of residues Rx(m/m) %
Size (µm)	Serial No.
<45 (receiver pan)	receiver pan	0.00	0.0	99.2
45	20111588	0.00	0.0	99.2
63	20111627	0.00	0.0	99.2
100	31121141	0.68	1.1	99.2
250	20111667	5.74	8.9	98.1
500	16111554	54.25	84.5	89.2
1000	20111725	2.83	4.4	4.7
2000	24111027	0.13	0.2	0.3
4000	14111099	0.04	0.1	0.1

g_x:the amount of material retained by the sieve x

r_x: ratio * 100 of the amount of material retained by the sieve x and sample mass

R_x: the calculated sum of residues on all the x sieves. Therefore the residue Rx on sieve x and the residues on all coarser sieves were summed.

Conclusions:

Particle size distribution: 250 - 1000 µm

Executive summary:

Particle size distribution of the test item was determined according to the CIPAC MT 59 Sieve Analysis, CIPAC MT 170 Dry Sieve Analysis of Water Dispersible Granules and CIPAC MT 169 Tap Density of Water Dispersible Granules test methods. Machine sieving test was carried out using the following test sieves 4, 2, 1 mm, 500, 250, 100, 63 and 45 µm.

The particle size distribution of the test item was found to be in the range of 250 and 1000 µm.

Conclusion

Particle size distribution: 250 - 1000 µm

Description of key information

Particle size distribution: 250 - 1000 µm

Additional information

CIPAC MT 59, CIPAC MT 170 and CIPAC MT 169 - Sieve