tungsten zirconium oxide

Density

Link to relevant study record(s)

Reference

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

30 June 2017

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)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

pycnometer method

Key result

Type:

relative density

Density:

3.408

Temp.:

20.2 °C

Remarks on result:

other: Mean value of two assays (assay No.1: 3.412, assay No.2: 3.404)

Two independent measurements at 19.9°C (assay No. 1) and 20.4°C (assay No. 2) were done. Runs 1, 2, 3, 4 and 5 of assay No. 1 and run 1 of assay No. 2 were not taken into account because they did not comply with the quality criteria.

The two assays resulted in mean relative densities of 3.412 ± 0.002 and 3.404 ± 0.002, respectively. The mean relative density of the two assays was thus 3.408 ± 0.005 at 20.2°C. The measured data are described in the tables found in the next section.

Conclusions:

The relative density of tungsten zirconium hydroxide oxide was determined to be 3.408 ± 0.005 at 20.2°C.

Description of key information

Based on the guideline study (Klimisch 1, Demangel, 2017) the mean relative density of tungsten zirconium hydroxide oxide is 3.408 ± 0.005 at 20.2°C.

Key value for chemical safety assessment

Relative density at 20C:

3.408