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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Experimental data provided by company, detailed report not available, but data are regarded as valid and sufficient for granulometry. The available data for particle size distribution are sufficient and adequate for the purpose of classification and labelling and/or risk assessment.
Principles of method if other than guideline:
Compilation of the granulometry of potassium hydrogencarbonate specifications
GLP compliance:
not specified
Type of method:
other: detailed report not available
Type of distribution:
other: Compilation of the granulometry of potassium hydrogencarbonate specifications
No.:
#1
Size:
> 0.85 mm
Distribution:
ca. 0.1 - 0.2 %
Remarks on result:
other: Fraction weight %, specification 1
No.:
#2
Size:
> 500 mm
Distribution:
4 - 20 %
Remarks on result:
other: Fraction weight %, specification 1
No.:
#3
Size:
> 0.25 mm
Distribution:
50 - 75 %
Remarks on result:
other: Fraction weight %, specification 1
No.:
#4
Size:
> 0.1 mm
Distribution:
> 85 %
Remarks on result:
other: Fraction weight %, specification 1
No.:
#5
Size:
>= 0.84 mm
Distribution:
0 - 5 %
Remarks on result:
other: Mass fraction %, specification 2
No.:
#6
Size:
>= 0.42 mm
Distribution:
5 - 20 %
Remarks on result:
other: Mass fraction %, specification 2
No.:
#7
Size:
>= 0.18 mm
Distribution:
45 - 65 %
Remarks on result:
other: Mass fraction %, specification 2
No.:
#8
Size:
>= 0.149 mm
Distribution:
5 - 10 %
Remarks on result:
other: Mass fraction %, specification 2
No.:
#9
Size:
>= 0.074 mm
Distribution:
10 - 25 %
Remarks on result:
other: Mass fraction %, specification 2
No.:
#10
Size:
< 0.074 mm
Distribution:
2 - 5 %
Remarks on result:
other: Mass fraction %, specification 2

Table 1 Particle size distribution potassium hydrogencarbonate

 

Particle size distribution[mm]

Fraction Weight %

> 0.850

max 0.1 – 0.2

> 0.500

4 - 20

> 0.250

50 - 75

> 0.100

min 85

 

Table 2: Sieve analyses U.S. market (potassium hydrogencarbonate, pharma grade)

 

Sieve

mass fraction (%) range

mesh

mm

min

max

20.00

0.840

0.0

0.5

40.00

0.420

5.0

20.0

80.00

0.180

45.0

65.0

100.0

0.149

5.0

10.0

200.0

0.074

10.0

25.0

<200

<0.074

2.0

5.0
Conclusions:
In a compilation of company technical data of potassium hydrogen arbonate specifications two particle size distributions are provided:
Specification 1:Particles > 0.850 mm (max 0.1 – 0.2 w/w%), > 0.500(4 – 20 w/w%), > 0.250 (max 50 - 75 w/w%), and > 0.100 (min 85 w/w%).
Specification 2: Particle size: 0.840 mm (0.0 - 0.5 w/w %), 0.420 mm (5.0 - 20.0 w/w %) 0.180 mm (45.0 - 65.0 w/w %), 0.149 mm (5.0 - 10.0 w/w %), 0.074 mm (10.0 - 25.0 w/w %) and <0.074 mm (2.0 -5.0).

Executive summary:

In a compilation of company technical data of potassium hydrogencarbonate specifications two particle size distributions are provided:

Specification 1:Particles > 0.850 mm (max 0.1 – 0.2 w/w%), > 0.500(4 – 20 w/w%), > 0.250 (max 50 - 75 w/w%), and > 0.100 (min 85 w/w%).

Specification 2: Particle size: 0.840 mm (0.0 - 0.5 w/w %), 0.420 mm (5.0 - 20.0 w/w %) 0.180 mm (45.0 - 65.0 w/w %), 0.149 mm (5.0 - 10.0 w/w %), 0.074 mm (10.0 - 25.0 w/w %) and <0.074 mm (2.0 - 5.0).

 

Description of key information

> 0.850 mm (max 0.1 – 0.2 w/w%), > 0.500(4 – 20 w/w%), > 0.250 (max 50 - 75 w/w%), and > 0.100 (min 85 w/w%)
The available data for particle size distribution are sufficient and adequate for the purpose of classification and labelling and/or risk assessment.

Additional information

Particle size distribution:

> 0.850 mm (max 0.1 – 0.2 w/w%), > 0.500(4 – 20 w/w%), > 0.250 (max 50 - 75 w/w%), and > 0.100 (min 85 w/w%)

 

Another potassium hydrogencarbonate quality shows very similar particle size distributions.