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Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10th April 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
pycnometer method
Type:
relative density
Density:
1.05 other: unitless
Temp.:
20 °C

Table 1: Results of relative density study

 Parameter  Replicate 1  Replicate 2
 w1  24.00752  25.01755
 w2  48.98512  49.72960
 w3  44.27069  45.06310
 w4  27.04896  28.00291
 w5  44.97136  45.76064
 W1  24.97760  24.71205
 W2  20.26317  20.04555
 W3  3.04144  2.98536
 W4  17.92240  17.75773
 W5 2.34077  2.28782
     
 ptl  0.8096  0.8095
 Mean ptl 0.8096
 Vs 2.891  2.826
 Dt4  1.05  1.06
 Mean Dt4  1.05

Where:

w1= weight of empty pycnometer (g)

w2= weight of pycnometer and water (g)

w3= weight of pycnometer and displacement liquid (g)

w4= weight of pycnometer and test item (g)

w5= weight of pycnometer, test item and displacement liquid (g)

W1 = Mass of water to fill pycnometer

W2 = Mass of displacement liquid to fill pycnometer

W3 = Mass of test item added to pycnometer

W4 = Mass of displacement liquid required to fill pycnometer containing W3g of test item

W5 = Mass of displacement liquid equivalent to W3g of test item

ptl= density of displacement liquid at temperature of determination (g/mL)

Dt4= relative density of test item at test temperature compared to water at 4°C

Conclusions:
The relative density of the test item was determined to be 1.05 at 20 °C.
Executive summary:

The relative density of the test item was determined in a study following OECD 109 and EC Method A.3 guidelines, using the pycnometer method. The relative density of the test item was determined to be 1.05 at 20 °C.

The study is a GLP compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.

Description of key information

The relative density of the test item was determined to be 1.05 at 20 °C.

Key value for chemical safety assessment

Relative density at 20C:
1.05

Additional information

The relative density of the test item was determined in a study following OECD 109 and EC Method A.3 guidelines, using the pycnometer method (Dunning 2018).

The study is a GLP compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.