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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:
11 September 2017 to 02 November 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Version / remarks:
2012
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
density
Density:
1 680 kg/m³
Temp.:
20 °C
Key result
Type:
relative density
Density:
1.68
Temp.:
20 °C

CALIBRATION

Table 1: Pressure readings and the calculated volume for the reference and sample cells

Determination

P1 (psig)

P2 (psig)

P3 (psig)

P4 (psig)

Reference Cell Volume (cm³)

Sample Cell Volume (cm³)

1

17.120

6.486

17.037

8.447

90.843

148.940

2

17.097

6.476

17.036

8.446

90.784

148.891

3

17.130

6.490

16.964

8.408

90.954

149.114

 

- Mean reference cell volume : 90.860 cm³ Mean sample cell volume : 148.981 cm³

- As the reference cell volume and sample cell volume were within the defined tolerance (90.953 ± 1.0 cm³ and 149.225 ± 1.0 cm³ for the reference and sample cell volumes respectively) the gas comparison pycnometer was therefore considered acceptable for use.

 

SAMPLE

Table 2: Pressure readings, calculated volumes and density values obtained for the test material

Determination

Replicate

P1(sample) (psig)

P2(sample) (psig)

Volume (cm³)

Density (kg/m³)

Mean Density (kg/m³)

1

A

17.013

7.273

27.3

1.68x10³

1.68x10³

B

17.046

7.285

27.2

1.68x10³

C

17.006

7.265

27.2

1.69x10³

2

A

17.110

7.416

30.2

1.68x10³

1.68x10³

B

17.042

7.387

30.2

1.68x10³

C

17.504

7.586

30.2

1.68x10³

 

- Mean density: 1.68 x 10³ kg/m³

- Relative density : 1.68

- Temperature : 20.0 ± 0.5 °C

- Duplicate determinations were performed to ensure a reproducibility of less than ± 20 kg/m³ was obtained.

Conclusions:
Under the conditions of this study the density of the test material has been determined to be 1.68 x 10³ kg/m³ at 20.0 ± 0.5 °C with a relative density of 1.68.
Executive summary:

The density of the test material was investigated in accordance with the standardised guidelines OECD 109 and EU Method A.3, under GLP conditions.

The testing was performed using a pycnometer, duplicate determinations were performed to ensure a reproducibility of less than ± 20 kg/m³ was obtained.

In calibration, the reference cell volume and sample cell volume were within the defined tolerance (90.953 ± 1.0 cm³ and 149.225 ± 1.0 cm³ for the reference and sample cell volumes respectively) the gas comparison pycnometer was therefore considered acceptable for use.

Under the conditions of this study the density of the test material has been determined to be 1.68 x 10³ kg/m³ at 20.0 ± 0.5 °C with a relative density of 1.68.

Description of key information

Under the conditions of this study the density of the test material has been determined to be 1.68 x 10³ kg/m³ at 20.0 ± 0.5 °C with a relative density of 1.68.

Key value for chemical safety assessment

Relative density at 20C:
1.68

Additional information

The density of the test material was investigated in accordance with the standardised guidelines OECD 109 and EU Method A.3, under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The testing was performed using a pycnometer, duplicate determinations were performed to ensure a reproducibility of less than ± 20 kg/m³ was obtained.

In calibration, the reference cell volume and sample cell volume were within the defined tolerance (90.953 ± 1.0 cm³ and 149.225 ± 1.0 cm³ for the reference and sample cell volumes respectively) the gas comparison pycnometer was therefore considered acceptable for use.

Under the conditions of this study the density of the test material has been determined to be 1.68 x 10³ kg/m³ at 20.0 ± 0.5 °C with a relative density of 1.68.