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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:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Reference:
Composition 0
Principles of method if other than guideline:
The use of secondary sources of data is acceptable when they are based on a critical evaluation of peer-reviewed data and a consequent selection of a reliable and representative value for the property under investigation. The introduction to the CRC Handbook of Chemistry and Physics states that data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Therefore, although the method used is not known, the values presented here are acceptable as they are from a reliable secondary source of phys chem. data.
GLP compliance:
not specified
Test material information:
Composition 1
Physical state at 20°C and 1013 hPa:
solid
Form:
solid: crystalline
Colour:
gray-black
Odour:
other: No data
Substance type:
inorganic
Conclusions:
At 20ºC and 1013 hPa ruthenium (IV) oxide is an inorganic gray-black solid of tetragonal crystals.
Executive summary:

This information from the CRC handbook is from a reliable peer-reviewed handbook and is suitable for use as the key study for this endpoint. At 20ºC and 1013 hPa ruthenium (IV) oxide is an inorganic grey-black solid of tetragonal crystals.

Description of key information

Ruthenium (IV) oxide is an inorganic grey-black solid of tetragonal crystals.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information

Lide (2008) is a reliable, peer-reviewed handbook and can be considered suitable for use as the key study for this endpoint. At 20ºC and 1013 hPa ruthenium (IV) oxide is an inorganic grey-black solid of tetragonal crystals.