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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 19 December 2018 to 22 February 2019
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:
not specified
GLP compliance:
no
Remarks:
The study was conducted in a facility which operates in accordance with Good Laboratory Practice principles; however no claim of GLP compliance was intended nor is made for this study
Type of method:
pycnometer method
Key result
Type:
relative density
Density:
ca. 0.96 other: Dimensionless
Temp.:
19 °C

Results

Calibration

The pressure readings and the calculated volume for the reference and sample cells are shown in the following table:

Determination

P1
(psig)

P2
(psig)

P3
(psig)

P4
(psig)

Reference Cell Volume (cm3)

Sample Cell Volume (cm3)

1

17.558

6.650

17.498

8.675

90.750

148.857

2

17.555

6.652

17.110

8.483

90.919

149.021

3

18.500

7.012

17.852

8.852

90.987

149.067

Mean reference cell volume: 90.885 cm3
Mean sample cell volume:
 148.982 cm3

As the reference cell volume and sample cell volume were within the defined tolerance (90.953 ± 1.0 cm3 and 149.225 ± 1.0 cm3 for the reference and sample cell volumes respectively), the gas comparison pycnometer was therefore considered acceptable for use.

Sample

The pressure readings, calculated volumes and density values obtained for the test substance are shown in the following table:

Determination

Replicate

P1(sample)
(psig)

P2(sample)
(psig)

Volume
(cm3)

Density
(kg/m3)

Mean Density (kg/m3)

1

A

17.514

7.975

40.273

959

960

B

17.682

8.050

40.236

960

C

17.896

8.146

40.201

961

2

A

17.294

7.811

38.642

959

959

B

17.517

7.913

38.675

958

C

17.187

7.762

38.625

960

Mean density: 959 kg/m3
Relative density:
 0.960
Temperature:
 19.0 ± 0.5 °C

Discussion

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

Conclusion

The density of the test substance has been determined to be 959 kg/m3 at 19.0 ± 0.5 °C and a relative density of 0.960.

Conclusions:
Under the study conditions, the relative density of the test substance was determined to be 0.960 at 19°C.
Executive summary:

A study was conducted to determine the density of the test substance using pyconmeter method, according to the OECD Guideline 109. Under the study conditions, the relative density of the test substance was determined to be 0.960 at 19°C (Envigo, 2019).

Description of key information

The density of the test substance was determined using the pyconmeter method, according to OECD Guideline 109 (Envigo, 2019).

Key value for chemical safety assessment

Additional information

Relaive density: 0.96 at 19°C