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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:
from 06 NOV 2006 to 15 JAN 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
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:
oscillating densitimeter
Key result
Type:
relative density
Density:
1.055 other: dimensionless
Temp.:
20 °C

First, the apparatus was tested by determination of the density of air and water at 20.0°C. The results for water are given in Table 1. These values are in the accepted range of 0.9982 ± 0.0003 g/cm3.

 

Table 2 shows the individual measurements for the density of DIMETHYL 2-METHYL GLUTARATE. From these, the mean value was calculated, corrected and given in the same table. The tabulated values represent rounded results obtained from calculation using the exact raw data.

Table 1:       Results of the calibration using air and water

The density of air was measured to be 0.0012 g/cm3.

Test No.

Temperature

[°C]

Density of water

[g/cm³]

 

 

 

measured

mean value

theoretical value

1

20.0

0.9982

 

 

2

20.0

0.9982

0.9982

0.9982

3

20.0

0.9982

 

 

 

Table 2:       Determination of the density of the test substance

Test No.

Temperature

[°C]

Density of DIMETHYL 2-METHYL GLUTARATE

[g/cm³]

 

 

 

measured

mean value

corrected for relative density

1

20.0

1.0553

 

 

2

20.0

1.0553

1.0553

1.0553

 

Calculation of the relative density

D420 = 1.0553 g/cm3/ 0.99997 g/cm3= 1.0553

Conclusions:
The relative density of DIMETHYL 2-METHYL GLUTARATE was determined to be 1.0553 at 20°C.


Executive summary:

The relative density of DIMETHYL 2-METHYL GLUTARATE was determined according to the method of the EEC Directive 92/69, part A.3, to the OECD Guideline No. 109 and to the GLP.

The method of the oscillating densitimeter was used. The apparatus was calibrated by determination of the density of air and water at 20.0°C. Then, the test substance was injected into the U-tube by means of a disposable plastic syringe, avoiding air bubbles. The sample was maintained at a temperature of 20.0°C±0.1°C in the apparatus. The density was read from the display after a constant oscillating frequency (constant period time) was reached.

The determination of the density was performed twice. The measurements did not vary by more than 0.0003 g/cm³ and were therefore accepted to be valid.

The relative density of DIMETHYL 2-METHYL GLUTARATE was determined to be D420= 1.0553 at 20°C.

Description of key information

The relative density of DIMETHYL 2-METHYL GLUTARATE was determined to be 1.0553 at 20°C.

Key value for chemical safety assessment

Relative density at 20C:
1.055

Additional information

One experimental study, scored as Klimisch 1, is available (Weissenfeld M., 2007) and selected as a key study.