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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:
14 Nov 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Type of method:
air comparison pycnometer (for solids)
Remarks:
helium gas
Type:
relative density
Density:
ca. 2 other: dimensionless
Temp.:
20 °C

Results
test 1 (wt. taken = 1.9052 g)

Run

Volume (cm3)

Density (g/cm3)

1*

0.9199

2.0710

2*

0.9377

2.0317

3*

0.9459

2.0142

4*

0.9495

2.0065

5

0.9530

1.9992

6

0.9554

1.9942

7

0.9519

2.0015

8

0.9570

1.9908

9

0.9528

1.9996

Mean

0.9540

1.9970

Standard deviation

0.0019

0.0039 (RSD = 0.20%)

 

test 2 (wt. taken = 2.1293 g)

Run

Volume (cm3)

Density (g/cm3)

1*

1.0316

2.0640

2*

1.0470

2.0338

3*

1.0582

2.0122

4*

1.0623

2.0045

5

1.0668

1.9960

6

1.0674

1.9948

7

1.0680

1.9937

8

1.0683

1.9932

9

1.0705

1.9980

Mean

1.0682

1.9933

Standard deviation

0.0013

0.0024 (RSD = 0.12%)

*Due to run precision function of the instrument, the analysis is stopped if 5 results are gained that have a variation of less than 0.05% of the cell volume, therefore the marked runs were not used to calculate the mean value

Calculation of Results
Relative density at 20.0 +/- 0.5 °C (g/cm3)
Obtained individual results: 1.9970 and 1.9933
Mean: 2.00 +/- 0.01

Description of key information

2.00 at 20 °C (Helium gas pycnometer, EU Method A3)

Key value for chemical safety assessment

Relative density at 20C:
2

Additional information

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