zirconium(IV) oxide, stabilised with erbium(III) oxide, gadolinium(III) oxide and yttrium(III) oxide

Density

Administrative data

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

10 June 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Reference

Endpoint:

appearance / physical state / colour

Type of information:

other: Visual inspection

Adequacy of study:

weight of evidence

Study period:

10 June 2016

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline followed

Principles of method if other than guideline:

Visual inspection upon receipt in the laboratory.

GLP compliance:

yes (incl. QA statement)

Physical state at 20°C and 1013 hPa:

solid

Form:

solid: particulate/powder

Colour:

pink

Odour:

other: no data

Substance type:

inorganic

Conclusions:

Upon receipt in the laboratory, the test material used for the physicochemical property testing was described as a pink powder.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 109 (Density of Liquids and Solids)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

air comparison pycnometer (for solids)

Test material

Test material information

Constituent 1

Reference substance name:

zirconium(IV) oxide, stabilised with erbium(III) oxide, gadolinium(III) oxide and yttrium(III) oxide

EC Number:

946-001-8

Molecular formula:

(Er2O3)w (Gd2O3)x (Y2O3)y (ZrO2)z: w/w% Er2O3 >= 1 <= 8 w/w% Gd2O3 >= 1 <= 8 w/w% Y2O3 >= 1 <= 8 w/w% ZrO2 >= 76 <= 97

IUPAC Name:

zirconium(IV) oxide, stabilised with erbium(III) oxide, gadolinium(III) oxide and yttrium(III) oxide

Test material form:

solid: particulate/powder

Details on test material:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: PEGYZ-23
- Expiration date of the lot/batch: 31 March 2021
- Purity: 100%

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Controlled room temperature (15-25 ºC, below 70% relative humidity), protected from light.

OTHER SPECIFICS
Description: pink powder (the colour was determined by visual inspection upon arrival at test facility)
Safety precautions: Routine safety precautions (lab coat, gloves, safety glasses, face mask) for unknown materials were applied to assure personal health and safety. Possibly irritative.

Results and discussion

Density

Key result

Type:

relative density

Density:

5.985

Temp.:

20.5 °C

Remarks on result:

other: Mean relative density and mean temperature based on 2 assays.

Any other information on results incl. tables

Detailed results of the two assays are given below. Note that Assay No. 1 was not taken into account, as the pressure values obtained were not stable and not reliable.

Assay No. 2:

Test item sample weight: 17.6691 g

Reference volume: 79.250 cm³

Volume of the sample holder: 27.636 cm³

Temperature during the assay: 20.7°C

Data	P2 (PSIG)	P3 (PSIG)	VP (cm³)	Density (g/cm³)	Relative density	Mean relative density
Run no. 6	17.039	4.047	2.9497	5.9902	5.9903	5.987 ± 0.005
Run no. 6	17.035	4.046	2.9501	5.9894	5.9895
Run no. 7	17.037	4.046	2.9539	5.9817	5.9818

Runs 1-5 were not taken into account because they did not comply with the quality criterion.

The relative density of the test item in assay No. 2 was 5.987 ± 0.005 at 20.7 °C.

Assay No. 3

Test item sample weight: 17.4810 g

Reference volume: 79.250 cm³

Volume of the sample holder: 27.636 cm³

Temperature during the assay: 20.3°C

Data	P2 (PSIG)	P3 (PSIG)	VP (cm³)	Density (g/cm³)	Relative density	Mean relative density
Run no. 3	17.248	4.100	2.9231	5.9803	5.9804	5.983 ± 0.002
Run no. 4	17.104	4.066	2.9213	5.9840	5.9842
Run no. 5	17.024	4.047	2.9211	5.9843	5.9845

Runs 1-2 were not taken into account because they did not comply with the quality criterion.

The relative density of the test item in assay No. 3 was 5.983 ± 0.002 at 20.3 °C.

Based on the results of assay No. 2 and 3, the mean relative density was calculated to be 5.985 +/- 0.004 at 20.5°C.

Applicant's summary and conclusion

Conclusions:

The mean relative density of the test item was determined to be 5.985 ± 0.004 at 20.5°C.