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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:
2019-06-17 to 2019-08-13
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:
EPA OPPTS 830.7300 (Density / Relative Density / Bulk Density)
Version / remarks:
2002
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
density
Density:
1.548 g/cm³
Temp.:
20 °C
Remarks on result:
other: Test No. 1
Key result
Type:
density
Density:
1.525 g/cm³
Temp.:
20 °C
Remarks on result:
other: Test No. 2
Key result
Type:
relative density
Density:
1.536 other: dimensionless
Remarks on result:
other: The relative density is dimensionless, thus no temperature is needed

The mean density of the test item at 20 °C is 1.5364 g/cm3.The relative density D_4^20 is calculated by dividing the density of the test item by the density of water at 4°C (0.9999750 g/cm³).

The relative density is D_4^20 = 1.536.

Conclusions:
In conclusion, the relative density of the test item as determined by gas comparison pycnometer method according to OECD guideline 109 (2012) is 1.536.
Executive summary:

The relative density of the test item was investigated by the gas comparison pycnometer method as described in OECD guideline 109 (2012).

A pressurized gas (He) was 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 as well as the volume of the reference chamber 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. By measuring

the mass of the test item, the density was determined. The relative density D_4^20 was obtained by dividing the measured density of the test item by the density of water at 4 °C (0.9999750 g/cm³).

The relative density D_4^20 was calculated to be 1.536.

Description of key information

The relative density of the test item as determined by gas comparison pycnometer method according to OECD guideline 109 (2012) is 1.536.

Key value for chemical safety assessment

Relative density at 20C:
1.536

Additional information

The relative density of the test item was investigated by the gas comparison pycnometer method as described in OECD guideline 109 (2012). The volume of the sample chamber as well as the volume of the reference chamber 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. By measuring the mass of the test item, the density was determined. The relative density D_4^20 was obtained by dividing the measured density of the test item by the density of water at 4 °C (0.9999750 g/cm³).

The relative density D_4^20 was calculated to be 1.536.