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Physical & Chemical properties

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:
other: Study carried out in accordance with an internationally accepted standard guideline without significant deviation. GLP is not required for studies of this type.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
other: ISO 13320:2009 Particle size analysis - Laser Diffraction Methods
Qualifier:
according to
Guideline:
other: IOM internal method: SOP-017: "Particle Size Distribution Analysis by Laser Diffraction"
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
other: Both volume-based (standard reporting of particle size distribution data) and number-based (pertinent to the nanomaterial definition) particle size distributions have been analysed.

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
8.65 µm
Remarks on result:
other: Taken from volume-based distribution.
Percentile:
D50
Mean:
0.668 µm
Remarks on result:
other: Taken from number-based distribution.

Any other information on results incl. tables

SUMMARY OF RESULTS

Copper (I) Thiocyanate: Particle Size Distribution Analysis

 Notation  Copper (I) Thiocyanate
   Volume
 D [4,3] - µm  9.22
 D (v,0.1) - µm  2.38
 D (v,0.5) - µm  8.65
 D (v,0.9) - µm  16.43
 Vol % <100 nm  0
   Number
 D (n,0.1) - µm  0.453
 D (n,0.5) - µm  0.668
 D (n,0.9) - µm  1.300
No.% <100 nm  0

Figure 1: Number- and Volume-Rated Particle Size Distributions, Copper (I) thiocyanate

[To see figure, refer to diagram in section "illustration (picture/graph)".

Volume Rated Particle Size Distribution

The volume distributions are seen to be very reproducible and bi-modal with maxima observed at approximately 9 and 70 µm.

Particle concentration (by volume) is seen to decrease after 9 µm, with no particles detected below 2 µm.

Number Rated Particle Size Distribution

The number distributions are also seen to be reproducible, and mono-modal with a maximum observed at approximately 4 µm. Particle concentration (by number) is seen to decrease sharply after 3 µm, with no particles detected below 1 µm. Based on the results from the number distribution, the material is not considered to fall under the EC’s recommended definition of nanomaterial (50% < 100 nm based on particle number).

DETAILED RESULTS

Aluminium Oxide Reference

            Volume Distribution           Number Distribution
 Run  D[4,3]  D(v,0.1)  D(v,0.5)   D(v,0.9)  % <100nm  D(n,0.1)  D(n,0.5)  D(n,0.9)  % <100nm
 1  8.00  1.21 4.62  20.9  0  0.501  0.783  1.58  0
 2  8.19 1.22 4.52  20.7  0  0.50  0.795  1.61  0
 3  9.44 1.24 4.85  22.7  0  0.50 0.794  1.61  0
 Avg 8.54 1.22  4.66  21.43  0  0.500  0.791  1.60  0
 Std Dev - 0.01  0.14  0.90  -  0.00  0.01  0.01  -
 COV -  1.01  2.986  4.20  -  0.09  0.69  0.88  -
 Check  -  <5  <3  <5  -  <5  <3  <5  -

The repeatability of the reference analysis was seen to be in accordance with the COV limits described in ISO13320.

Copper (I) Thiocyanate

Particle Size Distribution Analysis

  Volume Distribution Number Distribution
 Run  D[4,3]  D(v,0.1)  D(v,0.5)   D(v,0.9)  % < 100 nm  D(n,0.1)  D(n,0.5)  D(n,0.9)  % < 100 nm
 1  8.87  4.31  8.05  14.6  0  2.76  4.29  7.64  0
 2  9.95  4.42  8.28  15.5  0  2.80  4.38  7.81  0
 3  8.96  4.34  8.10  14.9  0  2.81  4.33  7.69  0
 Avg  9.26  4.36  8.14  15.0  0  2.79  4.33  7.71  0
 Std Dev  0.49  0.05  0.10  0.37  -  0.02  0.04  0.07  -
 COV  5.28  1.07  1.21  2.49  -  0.77  0.85  0.92  -
 Check  -  <5  <3  <5  -  <5  <3  <5  -

The repeatability of the sample analysis was seen to be in accordance with the COV limits described in ISO13320.

Applicant's summary and conclusion

Conclusions:
The volume-rated distribution of copper (I) thiocyanate was as follows: D(4,3) 9.22 µm; D(v,0.1) 2.38 µm; D(v,0.5) 8.65 µm; D(v,0.9) 16.43 µm. Volume % <100 nm was 0. The number-rated distribution of copper (I) thiocyanate was as follows: D(n,0.1) 0.453 µm; D(n,0.5) 0.668 µm; D(n,0.9) 1.300 µm. Number % <100 nm was 0.
Executive summary:

The volume-rated and number-rated particle size distributions for copper (I) thiocyanate were determined by laser diffraction using a Malvern MS3000 laser diffraction system in accordance with ISO 13320:2009.

The volume-rated distribution was as follows: D(4,3) 9.22 µm; D(v,0.1) 2.38 µm; D(v,0.5) 8.65 µm; D(v,0.9) 16.43 µm. Volume % <100 nm was 0. The number-rated distribution was as follows: D(n,0.1) 0.453 µm; D(n,0.5) 0.668 µm; D(n,0.9) 1.300 µm. Number % <100 nm was 0.