Zirconium zircon with encapsulated cadmium selenium sulphide

Density

Link to relevant study record(s)

Reference

Endpoint:

density, other

Remarks:

density and relative density

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Remarks:

Raw test data are missing in report. Estimated accurcay was not mentioned.

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.3 (Relative Density)

Deviations:

no

Type of method:

pycnometer method

Remarks:

helium stereopycnometer

Type:

density

Density:

4.7 g/cm³

Temp.:

20 °C

Remarks on result:

other: relative density D20/4 = 4.7

In order to calculate sample relative density D²⁰₄, the value of the density of water at 4 °C was looked up in the literature, this being 0.999975 g/cm³ according to the handbook of Chemistry and Physics. If it is assumed that sample density at 20 °C does not differ more than the own measurement error, this value is calculated from the quotient between the value of sample density at 20 °C and the value of water density at 4 °C, both expressed in the same units.

Conclusions:

The relative density D20/4 of the sample is 4.7.

Description of key information

Zirconium zircon with encapsulated cadmium selenium sulphide has a relative density of 4.7 at 20 °C in comparison to the density of water at 4 °C.

Key value for chemical safety assessment

Relative density at 20C:

4.7