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Density

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Reference
Endpoint:
density
Remarks:
density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
16 September 2015 to 09 December 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Guideline Study
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
pycnometer method
Key result
Type:
density
Density:
909 kg/m³
Temp.:
20
Remarks on result:
other: Relative Density - 0.909

CALIBRATION

- Pressure readings and the calculated volume for the reference and sample cells are shown in Table 3.4 (attached).

- As the reference cell volume and sample cell volume were within the defined tolerances (90.953± 1.0 cm3 and 149.225± 1.0 cm3 for the reference and sample cells respectively), the gas compression pycnometer was considered acceptable for use.

SAMPLE

- The mass of the vessel, vessel and test item, and the calculated mass of test item are shown in Table 3.6 (attached).

- Pressure readings obtained for the vessel and vessel containing test item are shown in Table 3.7 (attached).

- The calculated volumes and density obtained are shown in Table 3.8 (attached).

DISCUSSION

- Due to the test item's viscosity, it was considered that the pycnometer method for liquids would be impractical.

- Therefore, test item was transferred into glass vessels which would fit inside the sample cell of the gas comparison pycnometer and melted

- The samples were then allowed to solidity by equilibration to 20°C for at least one hour.

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

Conclusions:
The density of the test item has been determined to be 909 kg/m3 at 20.0 ± 0.5 °C and a relative density of 0.909
Executive summary:

GUIDELINE

Relative density was determined using a procedure designed to be compatible with Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012, and Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

METHOD

Relative density was determined using the gas comparison pycnometer method. After suitable calibration using reference cells, a test sample was measured in triplicate at 20 °C, and the mean relative density was calculated.

RESULTS

Reproducibility of less than± 20 kg/m3 was obtained during two determinations.

CONCLUSION

The density of the test item was determined to be 909 kg/m3at 20.0 ± 0.5°Cand a relative density of 0.909.

Description of key information

The density of the test item has been determined to be 909 kg/m3 at 20.0 ± 0.5 °C and a relative density of 0.909

Key value for chemical safety assessment

Relative density at 20C:
0.909

Additional information

GUIDELINE

Relative density was determined using a procedure designed to be compatible with Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012, and Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

METHOD

Relative density was determined using the gas comparison pycnometer method. After suitable calibration using reference cells, a test sample was measured in triplicate at 20 °C, and the mean relative density was calculated.

RESULTS

Reproducibility of less than± 20 kg/m3 was obtained during two determinations.

CONCLUSION

The density of the test item was determined to be 909 kg/m3 at 20.0 ± 0.5°C and a relative density of 0.909.