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Diss Factsheets

Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20.10.2005-21.02.2006
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
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
no
Type of method:
air comparison pycnometer (for solids)
Key result
Type:
relative density
Remarks:
solid
Density:
1.324 other: dimensionsless
Temp.:
20 °C
Key result
Type:
relative density
Remarks:
liquid
Density:
1.22 other: dimensionsless
Temp.:
20 °C

Relative Density of Solids: Gas comparison pycnometer

Before the measurement the test item was filled into the test vessel and cooled down in a refrigerator for crystallization. Subsequently the test item was stored at ambient temperature (24.7 - 24.8 °C) in the gas comparison pycnometer under Helium atmosphere. The test item remained solid under these conditions, due to the fact that the melting point is > 30 °C.

Two test series with different weights were performed at ambient temperature (24.7 - 24.8 °C) with the solid test item.

Results of the two tests

Measurement

Density ρPR/ g·cm

1

1.3249

2

1.3240

Mean

1.324

Mean density ρPRfor the two test series:1.324 g/cm3. The relative density of the test item at 20 °C (compared with water at 4 °C) was determined to be 1.324.

Relative Density for Liquids; Glass pycnometer

Before the measurement the test item was melted. The liquid test item was filled into the glass pycnometer and cooled down to 20 °C. The test item was tempered at this temperature before the measurement. The test item remained liquid under these conditions, due to the fact that the freezing point is < 4 °C. Two tests with different pycnometers were carried out at a temperature of 20 °C.

Results of the two tests

Measurement

Density ρPR/ g·cm

1

1.2226

2

1.2195

Mean

1.221

The relative density (compared to water at 4 °C) of the liquid test item is: D420= D2020x 0.998 = 1.221 x 0.998 = 1.22

Conclusions:
The relative density (compared to water at 4 °C) of the liquid test item is 1.324
Executive summary:

A study was performed in accordance with Commission Regulation (EC) No. 440/2008, method A.3 and OECD TG 109 by using the gas comparison pycnometer at 20.0°C. Two tests were performed and the density of the test item was determined. The relative density of the test item was determined to be 1.324.

Description of key information

The relative density of the test item at 20 °C (compared with water at 4 °C) was determined to be 1.324.

Key value for chemical safety assessment

Relative density at 20C:
1.324

Additional information

A study was performed in accordance with Commission Regulation (EC) No. 440/2008, method A.3 and OECD TG 109 by using the gas comparison pycnometer at 20 °C. Two tests were performed and the density of the test item was determined. The relative density of the test item (calculated from the mean density of the test item) was determined to be D420= 1.324.