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Density

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Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
01 February 2021 - 28 February 2021
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
GLP compliance:
yes
Type of method:
pycnometer method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source (i.e. manufacturer or supplier): Imerys

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: room temperature, in the dark

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing (e.g. warming, grinding):
- Preliminary purification step (if any):
- Final concentration of a dissolved solid, stock liquid or gel:
- Final preparation of a solid (e.g. stock crystals ground to fine powder using a mortar and pestle):

FORM AS APPLIED IN THE TEST (if different from that of starting material)
- Specify the relevant form characteristics if different from those in the starting material, such as state of aggregation, shape of particles or particle size distribution:
Key result
Type:
relative density
Density:
2.87
Temp.:
20 °C
Key result
Type:
density
Density:
2 870 kg/m³
Temp.:
20 °C
Conclusions:
A study was carried out according to OECD TG 109 to determine the relative density of Synthetic wollastonite.
Synthetic wollastonite has a density of 2.87 x 103 kg/m3 and relative density of 2.87.
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
Testing was conducted on 27 July 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method
Type:
relative density
Density:
2.36
Temp.:
20 °C

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

17.648

8.738

56.842

56.6

± 0.5

B

17.456

8.644

56.504

56.6

± 0.5

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

17.282

6.783

8.444

2360.8

B

17.299

6.833

9.914

2363.7

Temperature:            20.0 ± 0.5ºC
Mean density:           2362.2 kg/m3
Relative density:        2.36

Conclusions:
The relative density of the test item has been determined to be 2.36 at 20.0 ± 0.5°C.
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline method, non-GLP
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
GLP compliance:
no
Type of method:
air comparison pycnometer (for solids)
Key result
Type:
relative density
Density:
0.082
Temp.:
20 °C

Density was measured as 82.42 kg/m3. This result was divided by the density of water at 4 °C (999.9720 kg/m3) to derive the relative density.

Conclusions:
Density was measured as 82.42 kg/m3. This result was divided by the density of water at 4 °C (999.9720 kg/m3) to derive the relative density of 0.082 at 20 Deg c

Description of key information

Synthetic wollastonite has a density of 2.87 x 103 kg/m3 and relative density of 2.87.

Key value for chemical safety assessment

Relative density at 20C:
2.87

Additional information

The relative density of Synthetic Wollastonite was determined in a GLP study according to OECD guideline 109 using a gas comparison pycnometer method (Fox 2021)