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Diss Factsheets

Physical & Chemical properties

Density

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Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted on 21 April 2010.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. Study is conducted to an appropriate guideline, raw data is provided and therefore the study is considered to be acceptable for assessment and use as a key study. This study is conducted according to an appropriate guideline and under the conditions of GLP and therefore the study is considered to be acceptable and to adequately satisfy both the guideline requirement and the regulatory requirement as a key study for this endpoint.
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
UK GLP standards (Schedule 1, Good Laboratory Practice Regulations 1999 (SI 1999/3106 as amended by SI 2004/0994)). These Regulations are in accordance with GLP standards published as OECD Principles on Good Laboratory Practice (revised 1997, ENV/MC/CHEM
Type of method:
air comparison pycnometer (for solids)
Type:
relative density
Density:
3.72
Temp.:
22 °C

Results

Calibration

The pressure readings (P1and P2) and the calculated volume for the calibration ball are shown in the following table:

Determination

P1

P2

Volume (cm3)

Certified Volume (cm3)

Tolerance

(cm3)

A

17.071

6.676

1.052

1.073

± 0.05

B

17.490

6.842

1.058

1.073

± 0.05

Sample

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

Determination

P1

P2

Volume (cm3)

Density

(kg/m3)

A

17.647

6.588

0.146

3792.8

B

16.427

6.131

0.141

3669.5

C

17.842

6.660

0.144

3701.3

Temperature:            22.0 ± 0.5ºC
Mean density:                       3721.2 kg/m3
Relative density:                   3.72

Conclusions:
The relative density of the test item has been determined to be 3.72 at 22.0 ± 0.5°C.

This study is conducted according to an appropriate guideline and under the conditions of GLP and therefore the study is considered to be acceptable and to adequately satisfy both the guideline requirement and the regulatory requirement as a key study for this endpoint.
Executive summary:

The relative density of the test material has been determined to be 3.72 at 22.0 ± 0.5°C, using a gas comparison pycnometer, designed to be compatible with Method A3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Description of key information

Relative density:3.72 at 20.5 ± 0.5°C (EU Method A.3, GLP).

Key value for chemical safety assessment

Relative density at 20C:
3.72

Additional information

The relative density of the test material has been determined to be 3.72 at 22.0 ± 0.5°C, using a gas comparison pycnometer, designed to be compatible with Method A3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.