Zirconium dichloride oxide

Density

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

tap density

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

May 07, 2010

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Well performed study to determine tap density; no guideline followed. Temperature of measurement not recorded.

Principles of method if other than guideline:

Determination of the tap density in a measuring cylinder.

GLP compliance:

no

Type of method:

other: tap density

Type:

tap density

Density:

0.663 g/cm³

Remarks on result:

other: Temperature of measurement was not recorded; ambient conditions are anticipated.

The three individual determinations resulted in tap densities of 0.6667, 0.6667 and 0.6557 g/cm3.

Conclusions:

The tap density of zirconium dichloride oxide was determined to be 0.663 g/cm³.

Reference 2

Endpoint:

density, other

Remarks:

density

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

no data

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

Data in this peer-reviewed publication were taken from many sources, including both compilations and primary literature. Where conflicts were found, the value deemed most reliable was chosen for inclusion in the handbook. Reference sources were not provided for this parameter, nor were the experimental methods.

GLP compliance:

no

Type:

density

Density:

1.91 g/cm³

Remarks on result:

other: Temperature of measurement not reported

Conclusions:

Under the test conditions the density of the test substance was reported to be 1.91 g/cm³.

Description of key information

The tap density of zirconium dichloride oxide was determined to be 0.663 g/cm3 (Bradshaw , 2010). A peer-reviewed handbook reports the density of zirconium dichloride oxide to be 1.91 g/cm3. For both values, no temperature of measurement was reported. These results are used in a weight of evidence approach to cover the endpoint.

Additional information

The tap density was determined (Bradshaw, 2010) as due to the physical and chemical nature of this substance, other methods for determining the density are not applicable, e.g. pycnometry cannot be used as the material changes due to loss of moisture on degassing or pressurizing the material. Tap density was 0.663 g/cm³. The method of determination of the value (1.91 g/cm³) reported in the handbook of Lide (2001) is not known. It is suggested to use this information in a weight of evidence approach to cover the endpoint.