Zirconium diboride

Density

Administrative data

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 May 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

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

Type of method:

air comparison pycnometer (for solids)

Test material

Test material information

Constituent 1

Reference substance name:

Zirconium diboride

EC Number:

234-963-5

EC Name:

Zirconium diboride

Cas Number:

12045-64-6

Molecular formula:

ZrB2

IUPAC Name:

zirconium diboride

Test material form:

solid: particulate/powder

Details on test material:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: ZrB2-3.2/14
- Expiration date of the lot/batch: 04 March 2017
- Purity: 99%
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 and humidity
OTHER SPECIFICS:
Description: Grey 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.

Results and discussion

Density

Key result

Type:

relative density

Density:

6.092

Temp.:

20.9 °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:

Assay No. 1:

Test item sample weight: 14.2681 g

Reference volume: 79.250 cm³

Volume of the sample holder: 27.636 cm³

Temperature during the assay: 21.3°C

Data	P2 (PSIG)	P3 (PSIG)	VP (cm³)	Density (g/cm³)	Relative density	Mean relative density
Run no. 4	17.064	4.128	2.347	6.080	6.081	6.080  ± 0.001
Run no. 5	17.089	4.134	2.347	6.079	6.080
Run no. 6	17.089	4.134	2.347	6.079	6.080

Runs 1-3 were not taken into account because they did not comply with the quality criterion.

The relative density of the test item based on assay no. 1 was 6.080 ± 0.001 at 21.3°C.

Assay No. 2:

Test item sample weight: 14.4617 g

Reference volume: 79.250 cm³

Volume of the sample holder: 27.636 cm³

Temperature during the assay: 20.5°C

Data	P2 (PSIG)	P3 (PSIG)	VP (cm³)	Density (g/cm³)	Relative density	Mean relative density
Run no. 4	17.096	4.133	2.369	6.105	6.106	6.104  ± 0.003
Run no. 5	17.096	4.140	2.371	6.100	6.100
Run no. 6	17.096	4.119	2.369	6.106	6.106

Runs 1-3 were not taken into account because they did not comply with the quality criterion.

The relative density of the test item based on assay no. 2 was 6.104 ± 0.003 at 20.5°C.

The mean relative density of the test item was 6.092 +/- 0.013 at 20.9°C.

Applicant's summary and conclusion

Conclusions:

The mean relative density of the test item was determined to be 6.092 ± 0.013 at 20.9°C.