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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 18 March 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
Date of GLP inspection: 2009-09-15 Date of Signature on GLP certificate: 2009-11-26
Type of method:
air comparison pycnometer (for solids)
Key result
Type:
relative density
Density:
2.58
Temp.:
21.5 °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

17.457

6.827

1.052

1.073

± 0.05

B

17.210

6.734

1.062

1.073

± 0.05

C

17.250

6.749

1.061

1.073

± 0.05

D

17.258

6.753

1.063

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

17.430

6.762

0.899

2573.5

B

17.489

6.800

0.932

2578.0

Temperature:            21.5 ± 0.5ºC
Mean density:                       2575.8 kg/m3
Relative density:                   2.58

 

Conclusions:
The relative density of the test item has been determined to be 2.58 at 21.5 ± 0.5°C. This study is considered to be appropriate and reliable for use as a key study in accordance with Regulation (EC) No. 1907/2006 (REACH). No further testing is required.
Executive summary:

The relative density has been determined to be 2.58 at 21.5 ± 0.5°C, using a gas comparison pycnoter, designed to be compatible with Method A3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Description of key information

One key study exists. This study (Wooley A, 2010) was conclusive, done to a valid guideline (EU Method A.3) and the study was conducted under GLP conditions. It is therefore scientifically justified for use as a key study under Regulation (EC) No. 1907/2006.

Key value for chemical safety assessment

Relative density at 20C:
2.58

Additional information

The relative density of the test material has been determined to be 2.58 at 21.5°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.