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Diss Factsheets

Physical & Chemical properties

Density

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Administrative data

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental dates: 24 - 25 September 2020
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. No deviation affected the quality of the study. The substance is adequately identified, but some data on composition is missing. Therefore validation applies with restrictions.
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:
Commission Regulation (EC) No 440/2008 (no update to the A.3 method since 2008)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed on 15 Nov. 2018
Type of method:
pycnometer method
Dynamic viscosity of test material:
visually lowly viscous (suitable for pycnometer method)
Type:
density
Density:
911.5 kg/m³
Temp.:
20 °C
Key result
Type:
relative density
Density:
0.912 other: relative density has no dimension
Temp.:
20 °C

Results of the two determinations are reported in the following table:











































MeasurementDetermination
 12
Temperature (°C)20.020.0
Mass of the empty pycnometer (m0) (g)31.439331.6199
Mass of the pycnometer filled with ultrapure water (m2) (g)81.493181.6412
Mass of the pycnometer filled with the test item (m1) (g)77.142077.2908
Density of the test item (kg/m3)911.5911.5
Mean Density (kg/m3)911.5

The two determinations are within the validity criteria of the method: (less than 1% of difference).
No additional determination was performed.
The relative density of the test item was determined to be D20/4 = 0.912

Conclusions:
The substance is much less dense than water.
Executive summary:

The density of the test substance was measured under GLP according OECD 109 / EU A3 guideline, pycnometer method.
Calibration was performed with water. Experiment was performed at 20 °C in duplicate, and the mean density was calculated, and converted to relative density vs water at 4°C.
The density of the test substance at 20 ºC was 911.5 kg/m3. The relative density D20/4 was 0.912.

Description of key information

Experimental density = 911.5 kg/m3 at 20°C. Relative density D20/4 = 0.912. (OECD 109, pycnometer; GLP)
The substance is much less dense than water.

Key value for chemical safety assessment

Relative density at 20C:
0.912

Additional information

A reliable experimental study, conducted according to a recognized OECD method and under GLP, is available.
Despite minor restrictions due to incomplete test item identification, it is considered as key study, and the result is retained as key data.