Registration Dossier

Administrative data

Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 February 2017 - 20 June 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.3 (Relative Density)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
pycnometer method

Test material

Constituent 1
Chemical structure
Reference substance name:
ytterbia stabilised yttrium disilicate
Molecular formula:
Yb2-xYxSi2O7
IUPAC Name:
ytterbia stabilised yttrium disilicate
Test material form:
solid: particulate/powder
Details on test material:
Name: ytterbium doped yttrium disilicate
Physical state: solid
Appearance: white powder
Further information on test material confidential.

Results and discussion

Density
Key result
Type:
relative density
Density:
ca. 4.849
Temp.:
19 °C
Remarks on result:
other: Mean value of three assays (assay No.1: 4.894 ± 0.004, assay No.2: 4.804 ± 0.004, assay No.3: 4.848 ± 0.002)

Any other information on results incl. tables

Three independent measurements at 19.3°C (assay No. 1), 18.7°C (assay No. 2) and 19.0°C (assay No. 3) were done. Run No. 1 of assay No. 2 was not taken into account because it did not comply with the quality criterion. A longer stabilisation time of the pressure was needed to obtain three consequent runs complying with the quality criterion.

The three assays resulted in relative densities of 4.894 ± 0.004, 4.804 ± 0.004 and 4.848 ± 0.002, respectively. The mean relative density was thus 4.849 ± 0.045 at 19.0 °C.

Reference volume (Va) was 79.250 cm³.

Volume of sample cell holder (Vc) was 27.636 cm³.

Test item sample weight was 14.1562 g, 13.8138 g and 14.3944 g in assay No. 1, 2 and 3, respectively.

The measurements are described in the table in the next section.

Applicant's summary and conclusion

Conclusions:
The relative density of ytterbium doped yttrium disilicate was determined according to EU A.3 method and OECD test guideline 109 in compliance with GLP using a gas comparison pycnometer. The relative density of the test item was determined to be 4.849 ± 0.045 at 19.0°C.