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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:
The study was conducted between 21 August 2018 and September 2018.
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:
no
Qualifier:
according to
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
air comparison pycnometer (for solids)
Specific details on test material used for the study:
Identification: Reaction mass of crystalline magnesium silicate and crystalline silicon and synthetic amorphous silicon dioxide
Appearance/Physical state: black powder
Lot No: Y180510A
Purity: Mg-SiO 95 wt% Carbon 4.0 ± 2.0 %wt
Expiry date: 31 May 2019
Storage conditions: room temperature, in the dark
Key result
Type:
relative density
Density:
2.38 other: dimensionless
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

17.312

6.553

17.337

8.587

90.805

149.088

2

17.593

6.665

17.002

8.424

91.029

149.252

3

17.677

6.699

17.598

8.722

91.063

149.230

Mean reference cell volume : 90.966 cm3

Mean sample cell volume : 149.190 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

Replicate

P1(sample)(psig)

P2(sample)

(psig)

Volume

(cm3)

Density

(kg/m3)

Mean

Density

(kg/m3)

1

A

17.266

7.120

19.564

2.40 x103

2.38 x103

B

17.318

7.149

19.797

2.37 x103

C

17.544

7.243

19.818

2.37 x103

2

A

17.441

7.152

18.325

2.38 x103

2.37 x103

B

17.207

7.059

18.418

2.37 x103

C

17.447

7.161

18.527

2.36 x103

 

Mean density : 2.38 x103kg/m3

Relative density : 2.38

Temperature : 20.0 ± 0.5 °C

Conclusions:
The density of the test item has been determined to be 2.38 x10^3 kg/m^3 at 20.0 ± 0.5 °C and a relative density of 2.38.
Executive summary:

Density. 2.38 x 103 kg/m3 at 20.0 ± 0.5 °C, relative density of 2.38, using a gas comparison pycnometer, designed to be compatible with Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012.

Description of key information

Density. 2.38 x 103kg/m3at 20.0 ± 0.5 °C, relative density of 2.38, using a gas comparison pycnometer, designed to be compatible with Method A.3 Relative Density of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 109 of the OECD Guidelines for Testing of Chemicals, 02 October 2012.

Key value for chemical safety assessment

Relative density at 20C:
2.38

Additional information