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Diss Factsheets

Physical & Chemical properties

Density

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Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 1, 2000 - August 2, 2000
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)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
ca. 0.902 other: unitless
Temp.:
20 °C

None

Conclusions:
The relative density of the test substance at 20°C is 0.902.
Executive summary:

The relative density of the test substance was determined according to OECD guideline 109 and in accordance with EEC guideline 92/69/EEC A.3, Relative Density, Pycnometer method. Therefore samples of the test substance were weighed into calibrated pycnometers and the remaining air was removed by a suitable liquid. The test was performed twice. The relative density of the test substance was calculated from the masses of the pycnometer, the test substance, and the liquid, as well as the known values of the density of the liquid and the volume of the empty pycnometer. The relative density of the test substance at 20°C is 0.902.

Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From Jan. 18, 2002 to Jan. 18, 2002
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)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
ca. 0.909 other: unitless
Temp.:
20 °C
Remarks on result:
other: mean of two determinations

None

Conclusions:
The relative density of the test substance at 20°C is 0.909 (mean of two determinations).
Executive summary:

A study was conducted to determine the relative density of the test substance 'didecyldimethylammonium chloride' (DDAC) according to OECD guideline 109 and in accordance with EU method A.3, Relative Density, Pycnometer method. The caliberated were filled with the test substance and then weighed afterwards at 20°C. The test was performed twice. The relative density of the test substance was calculated from the masses of the pycnometer and the test substance, as well as the volume of the empty pycnometer. Under the conditions of the study, the mean relative density determinations of the test substance at 20°C was 0.909.

Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 November 2006 - 20 February 2007
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)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
ca. 0.87 other: unitless
Temp.:
20 °C

The density of the test substance was determined in triplicates. The empty, calibrated pycnometer was weighed. Approx. 3 g of the test item was weighed into each pycnometer. The pycnometers were filled up with the vehicle and kept for 30 min at 20 deg C. The full pycnometer was weighed and the density of the test item was calculated.

Conclusions:
For the purified substance a density was found to be 870 kg/m3.
Executive summary:

The relative density of the test substance was determined to be 0.87 in study conducted according to OECD guideline 109.

Description of key information

The relative density of the solid and liquid forms of the test substance were determined according to OECD Guideline 109 and EU Method A.3 (Schulze, 2007 and Schneider, 2000 and 2002).

Key value for chemical safety assessment

Relative density at 20C:
0.87

Additional information

- The relative density of the solid form of the test substance was determined to range from 0.87 to 0.902 at 20°C.

- The relative density of the liquid form of the test substance (containing 29.5% water) was 0.909 at 20°C.

The relative density of the solid purified form of the test substance has been considered further for hazard/risk assessment.