Dipotassium tetraoxomolybdate

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

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

Test guideline 2

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)

Test guideline 3

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Test guideline 4

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 187 Particle Size Analysis by Laser Diffraction

GLP compliance:

yes (incl. QA statement)

Type of method:

Laser scattering/diffraction

Type of distribution:

volumetric distribution

Test material

Test material information

Constituent 1

Reference substance name:

Dipotassium tetraoxomolybdate

EC Number:

236-599-2

EC Name:

Dipotassium tetraoxomolybdate

Cas Number:

13446-49-6

Molecular formula:

K2MoO4

IUPAC Name:

dipotassium tetraoxomolybdate

Test material form:

solid

Results and discussion

Particle size

Particle size 1

Key result

Percentile:

D10

Mean:

37.1 µm

St. dev.:

0.19

Particle size 2

Key result

Percentile:

D50

Mean:

151.12 µm

St. dev.:

3.44

Particle size 3

Key result

Percentile:

D90

Mean:

535.3 µm

St. dev.:

54.21

Particle size distribution at different passages

Particle size distribution at different passages 1

Size:

4 µm

Distribution:

0.09 %

Remarks on result:

other: Cumulative passing of specific particle sizes

Particle size distribution at different passages 2

Size:

10 µm

Distribution:

1.41 %

Remarks on result:

other: Cumulative passing of specific particle sizes

Particle size distribution at different passages 3

Size:

100 µm

Distribution:

37.8 %

Remarks on result:

other: Cumulative passing of specific particle sizes

Any other information on results incl. tables

Results

Two test series of 3 measurements each were performed with the test item.

Figure 1 and Figure 2 show the results of both test series. On the left y-axis the fraction distribution and on the right y-axis the cumulative distribution are shown.

Test series 1
D10	37.2 µm	Standard deviation: 0.80 µm
D50	154.6 µm (Median diameter)	Standard deviation: 4.13 µm
D90	589.5µm	Standard deviation: 36.87 µm
Test series2
D10	36.9 µm	Standard deviation: 0.62 µm
D50	147.7µm (Median diameter)	Standard deviation: 3.19 µm
D90	481.1µm	Standard deviation: 28.77 µm
Average
D10	37.1 µm	Standard deviation: 0.19 µm
D50	151.12 µm (Median diameter)	Standard deviation: 3.44 µm
D90	535.3 µm	Standard deviation: 54.21 µm

The percentages of the cumulative particle size distribution for specific particle sizes are shown in Table 1.

Table 1: Cumulative passing of specific particle sizes

Particle size /µm	Passing / % Test Series 1	Passing / % Test Series 2	Passing / % Mean
2	0.00	0.00	0.00
4	0.09	0.08	0.09
10	1.46	1.36	1.41
20	3.69	3.65	3.67
100	34.23	35.37	34.80
200	59.91	62.19	61.05
250	68.14	70.88	69.51
500	87.12	90.74	88.93
1000	96.57	98.24	97.41
2000	100.00	100.00	100.00