Tetrasodium 4-amino-5-hydroxy-3,6-bis[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: ASTM C136 (AASHTO T-27)

Deviations:

no

Principles of method if other than guideline:

Procedure
1. Record the mass of the sample to be used.
2. Stack sieves in order from smallest to largest, starting at the bottom, with the pan below the smallest sieve.
3. Add the powder sample to the top sieve.
4. Tighten the equipment to ensure that the sieve stack is held firmly in the shaker assembly.
5. Set the sieve shaker to vibrate for 15 minutes.

Results
1. Carefully weigh the mass retained on each sieve and in the pan.
2. Organize the results in a table which provides columns for sieve number, sieve size, mass fraction retained.
The mass fraction is defined as the mass retained on a particular sieve divided by the initial sample mass.

GLP compliance:

no

Type of method:

sedimentation (gravitational settling)

Type of distribution:

mass based distribution

Test material

Test material information

Constituent 1

Reference substance name:

Tetrasodium 4-amino-5-hydroxy-3,6-bis[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate

EC Number:

241-164-5

EC Name:

Tetrasodium 4-amino-5-hydroxy-3,6-bis[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate

Cas Number:

17095-24-8

Molecular formula:

C26H25N5O19S6.4Na

IUPAC Name:

tetrasodium 4-amino-5-hydroxy-3,6-bis[(4-{[2-(sulfonatooxy)ethyl]sulfonyl}phenyl)diazenyl]naphthalene-2,7-disulfonate

Test material form:

solid: particulate/powder

Results and discussion

Particle size

Percentile:

D90

Mean:

< 25 µm

St. dev.:

0

Remarks on result:

not measured/tested

Particle size distribution at different passages

Particle size distribution at different passages 1

No.:

#3

Size:

32 µm

Distribution:

100 %

Particle size distribution at different passages 2

No.:

#2

Size:

25 µm

Distribution:

92.42 %

Particle size distribution at different passages 3

No.:

#1

Size:

20 µm

Distribution:

80.12 %

Applicant's summary and conclusion

Conclusions:

D90 < 25 microns