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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:
15 January 2016 to 07 December 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)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
density
Density:
1 048.2 kg/m³
Temp.:
20 °C
Key result
Type:
relative density
Density:
1.048
Temp.:
20 °C

- The density of the test material was 1.0482 g/cm^3 (1048.2 kg/m3) at 20 °C.

- The relative density (D4^20) was 1.0482.

Table 1: Full Results from the Density Study

Run

Density (g/cm^3)

Density (kg/m^3)

1

1.0491

1049.1

2

1.0488

1048.8

3

1.0480

1048.0

4

1.0484

1048.4

5

1.0467

1046.7

Mean

1.0482

1048.2

Conclusions:
Under the conditions of this study the density of the test material was 1.0482 g/cm^3 (1048.2 kg/m^3) at 20 °C. The relative density (D4^20) was 1.0482.
Executive summary:

The relative density of the test material was investigated in accordance with the standardised guideline OECD 109, under GLP conditions.

The procedure was performed using a pycnometer, the apparatus was calibrated with a ball of known volume from five sets of pressure measurements of an inert gas (helium). The ball was placed in a measuring cup in the instrument and the test chamber was sealed and charged with helium. The gas was then allowed to expand into a further chamber of known volume and the volume of the test chamber was calculated from the pressure data using the gas laws. The density of the test material was determined in a similar manner after the ball was replaced with test material. The sample density was calculated from the weight and volume. A mean average was calculated from the five runs performed.

Under the conditions of this study the density of the test material was 1.0482 g/cm^3 (1048.2 kg/m^3) at 20 °C. The relative density (D4^20) was 1.0482.

Description of key information

Under the conditions of this study the density of the test material was 1.0482 g/cm^3 (1048.2 kg/m^3) at 20 °C. The relative density (D4^20) was 1.0482.

Key value for chemical safety assessment

Relative density at 20C:
1.048

Additional information

The relative density of the test material was investigated in accordance with the standardised guideline OECD 109, 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 procedure was performed using a pycnometer, the apparatus was calibrated with a ball of known volume from five sets of pressure measurements of an inert gas (helium). The ball was placed in a measuring cup in the instrument and the test chamber was sealed and charged with helium. The gas was then allowed to expand into a further chamber of known volume and the volume of the test chamber was calculated from the pressure data using the gas laws. The density of the test material was determined in a similar manner after the ball was replaced with test material. The sample density was calculated from the weight and volume. A mean average was calculated from the five runs performed.

Under the conditions of this study the density of the test material was 1.0482 g/cm^3 (1048.2 kg/m^3) at 20 °C. The relative density (D4^20) was 1.0482.

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