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Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
09 August 2017 - 20 November 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
Regulation (EC) 440/2008 of 30 May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
02 October 2012
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
air comparison pycnometer (for solids)
Dynamic viscosity of test material:
Not applicable. The test item is a solid, viscosity need only be considered for liquid test items.
Key result
Type:
relative density
Remarks:
Mean Relative Density
Density:
1.573 other: Dimensionless quantity.
Temp.:
20 °C
Type:
relative density
Remarks:
Measurement 1
Density:
1.57 other: Dimensionless quantity.
Temp.:
20 °C
Type:
relative density
Remarks:
Measurement 2
Density:
1.575 other: Dimensionless quantity.
Temp.:
20 °C

The density of the test item determined two times with individually prepared samples. Since the relative deviation between two measurements was ≤ 0.5 % the quality criteria of the measurement were fulfilled. The data, the mean of the densities, and its relative deviation are presented in Table 2 and Table 3.

 

 

Table 2:          Mass of the Test Item

Sample No.

Mass of empty vessel

Mass of vessel and test item

Mass of test item

[g]

[g]

[g]

1

6.5625

12.0801

5.5176

2

6.5619

12.1822

5.6203

 

 

Table 3:          Density of the Test Item

Sample No.

Measured sample volume

Test Item Weight

Temperature

Density

Relative Density

[cm3]

[g]

[°C]

[g/cm3]

[-]

1

3.51488

5.5176

20.0

1.5698

1.5698

2

3.56770

5.6203

20.0

1.5753

1.5753

mean:

20.0

1.5726

1.5726

absolute deviation:

0.0

0.0055

0.0055

relative deviation [%]:

0.0

0.35

0.35

 

 

The mean relative density (D204) of the test itemwas determined to be 1.5726 relating to the nominal density of water at 4 °C (0.999972 g/cm3).     

Conclusions:
The mean relative density of the test item was determined to be 1.5726 at 20 °C.
Executive summary:

EU Method A.3. – The relative density of the test item was determined utilising an air comparison pycnometer.  The procedure employed was designed to be compatible with Method A.3. Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Two determinations were carried out.  An instrumentation check was performed by measuring of the volume of the reference sphere.  Aliquots of test item (5.5 – 5.6 g) were placed in the measuring cell.  The density of the test item was determined.  This determination was performed twice at 20.0 °C ± 0.2 °C to acquire an average value.

The relative density (D420) of the test item was calculated to be 1.5726, based on the ratio of the measured density of the test item relative to the density of water at 4 °C.

Description of key information

Relative Density: D204 = 1.5726; EU Method A.3.; C Bär (2017)

Key value for chemical safety assessment

Relative density at 20C:
1.573

Additional information

EU Method A.3. – The relative density of the test item was determined utilising an air comparison pycnometer.  The procedure employed was designed to be compatible with Method A.3. Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Two determinations were carried out.  An instrumentation check was performed by measuring of the volume of the reference sphere.  Aliquots of test item (5.5 – 5.6 g) were placed in the measuring cell.  The density of the test item was determined.  This determination was performed twice at 20.0 °C ± 0.2 °C to acquire an average value.

The relative density (D420) of the test item was calculated to be 1.5726, based on the ratio of the measured density of the test item relative to the density of water at 4 °C.