Registration Dossier

Physical & Chemical properties

Density

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Between 15 February and 03 March 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
equivalent or similar to
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
using a gas comparison pycnometer, designed to be compatible with Method A3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
using a gas comparison pycnometer, designed to be compatible with Method A3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
Deviations:
no
GLP compliance:
yes
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
1 330 kg/m³
Temp.:
21.5 °C
Remarks on result:
other: Temperature:              21.5 ± 0.5 ºC

Results

Calibration

 

The pressure readings and the calculated volume for the reference and sample cells are shown in the following table:

 

Table 3.6

 

Determination

P1

P2

P3

P4

Reference Cell Volume (cm3)

Sample Cell Volume (cm3)

1

18.177

6.878

18.054

8.941

90.707

149.011

2

19.123

7.243

17.948

8.892

90.966

149.203

 

Sample

 

The pressure readings, calculated volumes and density values obtained for the test item are shown in the following table:

 

Table 3.7

 

Determination

Test

P1

P2

Volume (cm3)

Density

(kg/m3)

Mean Density (kg/m3)

1

A

17.422

7.254

21.781

1.34 x 103

1.34 x 103

B

17.227

7.173

21.786

1.34 x 103

C

17.584

7.321

21.767

1.34 x 103

2

A

17.893

7.318

17.842

1.32 x 103

1.33 x 103

B

17.742

7.251

17.682

1.33 x 103

C

17.373

7.098

17.613

1.33 x 103

 

Temperature:              21.5 ± 0.5 ºC
Mean density:
             1.33 x 103 kg/m3

 

Conclusions:
The density of the test item has been determined to be 1.33 x 10E3 kg/m3 at 21.5 ± 0.5 °C.
Executive summary:

The determination was carried out using a gas comparison pycnometer, designed to be compatible with Method A3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Principle of the Test

A sample cell of known volume is partially filled with an accurately weighed amount of the test item. The sample cell is filled with an inert gas at ambient pressure. A reference cell of known volume is pressurized with the inert gas and the pressure recorded. The two cells are then connected, and after equilibration, the resulting pressure is recorded.

 

The test item volume is calculated from the two pressure readings, assuming that the inert gas exhibits ideal gas behaviour. The density of the test item is then calculated from the known mass and the determined volume.

 

  

Performance of the Test

Calibration Procedure

A reference cell with the defined volume (Vref) was pressurised to a typical pressure in the range 16 to 20 psi and the pressure recorded (P1). Following this, the volume of the sample cell was added to the system, resulting in a reduction in pressure, which was also recorded (P2). The volume calibration of the reference cell and the sample cell was confirmed using a stainless steel calibration ball with known volume (Vcal). The test procedure as outlined above was repeated with the sample cell containing the calibrated ball (pressure readings P3and P4for the upper and lower pressure values, respectively).

Conclusion

The density of the test item has been determined to be 1.33 x 103kg/m3at 21.5 ± 0.5 °C.

 

From these four pressure readings, the volume of the reference cell (Vref) and of the sample cell (Vcell) was calculated as outlined in the data handling section. The temperature was monitored and recorded.

Both determinations were performed in triplicate.

Description of key information

The density of the test item has been determined to be 1.33 x 10E3 kg/m3 at 21.5 ± 0.5 °C.

Key value for chemical safety assessment

Relative density at 20C:
1 330

Additional information