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EC number: 909-709-8 | CAS number: -
Density
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative density
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 09-JUL-2010 to 07-SEP-2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.3 (Relative Density)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 109 (Density of Liquids and Solids)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- air comparison pycnometer (for solids)
- Key result
- Type:
- relative density
- Density:
- 6.7
- Temp.:
- 20 °C
- Remarks on result:
- other: +/- 0.062
- Conclusions:
- The relative density of the reaction mass of cerium dioxide and zirconium dioxide is: D(20°C/4°C) = 6.7 +/- 0.062.
- Executive summary:
The relative density of the reaction mass of cerium dioxide and zirconium dioxide was investigated in a GLP-compliant study performed according to EU method A3 and OECD guideline 109, using a stereopycnometer. A relative density of 6.7 +/- 0.062 was reported.
Reference
Assay 1 (at 19.6°C):
Data |
P2(PSIG) |
P3(PSIG) |
VP(cm3) |
Mean density (g/cm3) |
Mean relative density |
||
Run No. 1 |
17.080 |
4.751 |
2.5011 |
6.7664 |
6.761 |
|
0.005 |
Run No. 3 |
17.081 |
4.751 |
2.5035 |
6.7599 |
± |
||
Run No. 4 |
17.049 |
4.742 |
2.5044 |
6.7575 |
|
||
Assay 2 (at 20.3°C):
Data |
P2(PSIG) |
P3(PSIG) |
VP(cm3) |
Mean density (g/cm3) |
Mean relative density |
||
Run No. 1 |
17.073 |
4.744 |
2.5461 |
6.6374 |
6.638 |
|
0.002 |
Run No. 2 |
17.087 |
4.748 |
2.5451 |
6.64 |
± |
||
Run No. 5 |
17.066 |
4.742 |
2.5466 |
6.6361 |
|
||
Description of key information
The relative density of the reaction mass of cerium dioxide and zirconium dioxide is: D(20°C/4°C) = 6.7 +/- 0.062. This relative density measurement was performed on a representative nanoform, but the relative density of any potential bulk form, should such form be placed on the market, can be expected to be very similar.
Key value for chemical safety assessment
- Relative density at 20C:
- 6.7
Additional information
A GLP-compliant study of reliability 1 according to Klimisch was available on the reaction mass (Demangel, 2010b). It was flagged as a key study. As density is a substance-specific parameter, density values of both constituents were not reported here.
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