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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:
Aug 12 - Dec 01, 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
yes (incl. QA statement)
Remarks:
The Department of Health of the Government of the United Kingdom
Type of method:
pycnometer method
Type:
relative density
Density:
0.98 other: dimensionless
Temp.:
20 °C
Type:
density
Density:
979.9 kg/m³
Temp.:
20 °C

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

17.119

6.477

17.331

8.585

90.597

148.855

2

17.097

6.477

17.647

8.745

90.975

149.168

3

17.821

6.754

17.158

8.503

91.120

149.308

Mean reference cell volume : 90.898 cm3 Mean sample cell volume : 149.110 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 item are shown in the following table:

Determination

Test

P1(sample)(psig)

P2(sample)

(psig)

Volume (cm3)

Density

(kg/m3)

Mean Density (kg/m3)

1

A

17.032

8.301

53.504

975.6

973.5

B

17.045

8.315

53.676

972.5

C

17.058

8.322

53.691

972.2

2

A

17.090

8.750

62.472

990.4

984.0

B

17.330

8.903

63.073

980.9

C

17.076

8.773

63.082

980.8

3

A

17.010

9.165

71.304

983.2

982.4

B

17.131

9.233

71.356

982.5

C

17.128

9.236

71.440

981.3

Mean density : 979.9 kg/m3 Relative density : 0.980 Temperature : 20.0 ± 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 item has been determined to be 979.9 kg/m3 at 20.0 ± 0.5 °C; relative density: 0.980.

Description of key information

979.9 at 20.0 ± 0.5 °C using a gas comparison pycnometer (Method A.3/OECD 109)

Key value for chemical safety assessment

Additional information