Registration Dossier
Registration Dossier
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EC number: 909-709-8 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Physicochemical data available for the reaction mass of cerium dioxide and zirconium dioxide and its constituents are synthetised in the table below:
Endpoints |
Reaction mass |
Cerium dioxide |
Zirconium dioxide |
Appearance/physical state/colour |
Yellow inorganic powder |
Not provided as it is a substance-specific endpoint |
|
Melting point |
>500 °C |
>400 °C |
approx 2700 °C |
Boiling point |
Waived based on high melting point value |
>400 °C |
4300 °C |
Relative density (D20/4) |
6.7 |
Not provided as it is a substance-specific endpoint |
|
Granulometry |
D50 = 2.557 µm and 12.055 µm (two independent sources) |
Not provided as it is a substance-specific endpoint |
|
Vapour pressure |
Waived based on high melting point value |
||
Partition coefficient |
Waived based on inorganic nature |
||
Water solubility |
0.16 µg/L (0.071 µg Ce/L) |
< 0.123 µg/L (< 0.1 µg Ce/L) |
< 55 µg/L (< 40.8 µg Zr/L) |
Surface tension |
Waived based on low water solubility |
||
Flash point |
Waived based on inorganic nature |
||
Flammability |
No potential to be flammable based on chemical structure |
Non flammable |
No potential to be flammable based on chemical structure |
Explosiveness |
No potential for explosiveness based on chemical structure |
Non explosive |
No potential for explosiveness based on chemical structure |
Oxidising properties |
No potential for oxidising properties based on chemical structure |
No oxidising properties |
No potential for oxidising properties based on chemical structure |
Stability in organic solvents |
Waived based on inorganic nature |
||
Dissociation constant |
Waived as technically not feasible |
||
Viscosity |
Waived based on solid physical state |
||
| Auto flammability | No potential to be auto flammable based on chemical structure | Not auto flammable | No potential to be auto flammable based on chemical structure |
These data clearly show that the reaction mass and its constituents present highly similar physicochemical properties; supporting the relevance of potential read across with constituents when data on the reaction mass are not available.
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