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Physical & Chemical properties

Appearance / physical state / colour

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Reference
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Justification for type of information:
Basic observations of the substance and attempts to dry first to hydrated solid and then to dry to form anhydrous material.
Qualifier:
no guideline followed
Principles of method if other than guideline:
Basic observations of the material and attempts to remove water
GLP compliance:
no
Specific details on test material used for the study:
Batch number of test material: D-02-4057
Nominal 64% purity as hydrate in water
Physical state at 20°C and 1013 hPa:
solid
Key result
Form:
solid: particulate/powder
Remarks:
Hygroscopic
Colour:
Clear crystals
Substance type:
inorganic
Conclusions:
Considered to decompose at high temperatures (above 100 °C), to form zirconia (ZrO2).
Attempts to remove water at lower temperatures and partial vacuum also appears to lead to formation of oxides that fail to re-dissolve in water
Executive summary:

The substance is produced as a liquid and further dried for analysis purpose to form a hydrated solid. Further heating resulted in formation of white solid that failed to re-dissolve in water, suggesting at least partial oxidation to ZrO2.

Dryring under partial vacuum using less elevated temperatures still results in at least partial oxidation.

Description of key information

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information

Although will dry to a solid, the substance is manufactured and supplied in water and for the purposes of the SDS, this is considered liquid.

Although possible to generate solid, this is a hydrated material still containing water. If heating or using other methods such as vacuum to remove water, there is evidence of oxidation.

The solid is low dust and is hygroscopic.