Cerium dioxide

Density

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 03 NOV 2005 to 02 MAR 2006

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)

Version / remarks:

and EU Method A.3 (Relative Density)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

air comparison pycnometer (for solids)

Key result

Type:

relative density

Density:

7.2 g/cm³

Temp.:

20.3 °C

Determination of the density of cerium dioxide

Sample n°	Sample weight [g]	Measurement	p1 (sample) [psi]	p2 (sample) [psi]	V (sample) [cm3]	Density [g/cm3]
1	103.155	1 2 3	15.544 15.533 15.457	5.088 5.091 5.059	14.338 14.340 14.316	7.195 7.193 7.205
2	109.900	1 2 3	15.406 15.640 15.649	5.065 5.142 5.145	15.261 15.264 15.265	7.201 7.200 7.199
Mean ± Standard deviation [g/cm3]						7.199 ± 0.004

Conclusions:

The relative density of cerium dioxide was determined to be 7.20 g/cm3.

Executive summary:

The relative density of the test item was determined using a gas comparison pycnometer, according to OECD Guideline N°109 under GLP compliance. The density of cerium dioxide was determined to be 7.20 g/cm3 at 20.3 ± 0.1°C.

Reference 2

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

supporting study

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

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline available

Principles of method if other than guideline:

No data

GLP compliance:

no

Type:

relative density

Density:

7.132 g/cm³

Conclusions:

The relative density of cerium dioxide was determined to be 7.132 g/cm3.

Reference 3

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Remarks:

; the density value is just cited in the publication, without further information on the experimental conditions.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline available

Principles of method if other than guideline:

No data.

GLP compliance:

no

Type:

relative density

Density:

7.28 g/cm³

Conclusions:

The relative density of cerium dioxide was determined to be 7.28 g/cm3.

Reference 4

Endpoint:

relative density

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Remarks:

; the density value is just cited in the publication, without further information on the experimental conditions.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline available

Principles of method if other than guideline:

No data

GLP compliance:

no

Type:

relative density

Density:

7.65 g/cm³

Conclusions:

The relative density of cerium dioxide was determined to be 7.65 g/cm3.

Description of key information

Density: 7.20 g/cm3 at 20.3 ± 0.1°C.

Key value for chemical safety assessment

Relative density at 20C:

7.2

Additional information

An experimental study, scored as Klimisch 1, is selected as a key study with a density of 7.2 g/cm3. Two publications and one reference handbook, all selected as supporting studies, give consistent density values, ranging from 7.132 to 7.65 g/cm3.