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Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-05-30 to 2017-08-07
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:
May 30, 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7300 (Density / Relative Density / Bulk Density)
Version / remarks:
2002
Deviations:
no
Qualifier:
according to guideline
Guideline:
CIPAC MT 186 (Bulk Density)
Version / remarks:
2009
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
air comparison pycnometer (for solids)
Key result
Type:
relative density
Density:
1.32 other: dimensionless
Temp.:
20 °C
Conclusions:
In the present study conducted according to OECD guideline 109 (2002) the relative density of Compimide 183 was determined using a gas comparison pycnometer. The relative density (compared to water at 4°C) was determined to be 1.32.

Description of key information

- study according to OECD 109 (2012), air comparison pycnometer, relative density: 1.32

Key value for chemical safety assessment

Relative density at 20C:
1.32

Additional information

The density of solids is determined with a calibrated gas comparison pycnometer at a temperature of 20 °C ± 0.01 °C. A pressurized gas (He) is expanded from a pressurized reference chamber into a sample chamber in which the test item is placed under atmospheric pressure.

The volume of the sample chamber (24.9 cm³) as well as the volume of the reference chamber (21.3 cm³) are exactly known. The free volume of the sample chamber into which the gas is expanded can be calculated by the ideal gas law. With the free gas volume of the sample chamber, the volume of the test item in the sample chamber can be calculated by subtracting the free gas volume from the total chamber volume. The pressurizing-expansion cycles were performed until 5 subsequent volume measurements had a relative standard deviation (RSD) of s 0.2 %.

Two tests with different amounts of the test item were performed to determine the relative density D420 at a temperature of 20 °C ± 0.01 °C. The mean density of the test item at 20 °C is 1.319815 g/cm³ .The relative density D420 is calculated by dividing the density of the test item by the density of water at 4°C (0.999975O g/cm³). The relative density is D420= 1.32.

According to OECD Test Guidelines 109 (2012) and Regulation EC No. 440/2008 Method A.3., the relative density D420of the test item Compimide 183 at 20 °C i 0.01 °C (compared to water at 4 °C) is D420 = 1.32.