Registration Dossier

Administrative data

Endpoint:
relative density
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
Year:
2018
Report date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
2008
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
2012
GLP compliance:
not specified
Type of method:
air comparison pycnometer (for solids)
Remarks:
Gas comparison pycnometer

Test material

Constituent 1
Chemical structure
Reference substance name:
Dipotassium dihydrogen 4-[5-[3-carboxylato-5-hydroxy-1-(4-sulphonatophenyl)-1H-pyrazol-4-yl]penta-2,4-dienylidene]-4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
EC Number:
257-479-6
EC Name:
Dipotassium dihydrogen 4-[5-[3-carboxylato-5-hydroxy-1-(4-sulphonatophenyl)-1H-pyrazol-4-yl]penta-2,4-dienylidene]-4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
Cas Number:
51858-17-4
Molecular formula:
C25H16N4O12S2.2K
IUPAC Name:
dipotassium dihydrogen 4-[(1E,3E)-5-[(4E)-3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-ylidene]penta-1,3-dien-1-yl]-5-hydroxy-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylate
Test material form:
solid: crystalline

Results and discussion

Density
Key result
Type:
relative density
Density:
1.7 other: dimensionless
Temp.:
20 °C

Any other information on results incl. tables

Two tests with different amounts of the test item were performed to determine the relative density D420 at a temperature of 20 °C ± 0.01 °C. Results are shown below:

Test No.

Temperature [°C]

Amount of test item [g]

Average sample volume [cm3]

Density [g/cm3]*

1

20

6.41

3.76970

1.70040

2

20

6.52

3.83816

1.69873

* The pressurizing-expansion cycles are performed until 5 subsequent volume measurements have a relative standard deviation (RSD) of ≤ 0.2 %.

The mean density of the test item at 20 °C is 1.69956 g/cm3. The relative density is calculated by dividing the density of the test item by the density of water at 4 °C (0.9999750 g/cm3).

The relative density is D420 = 1.70.

Applicant's summary and conclusion

Conclusions:
The relative density of the test item Oxonole Blue at 20 °C ± 0.01 °C (compared to water at 4 °C) is 1.70.