Ruthenium tetroxide

Ruthenium(VIII) oxide
Names
	IUPAC name Ruthenium(VIII) oxide
Identifiers
CAS Number	20427-56-9 ;
3D model (JSmol)	Interactive image;
ChemSpider	106401;
ECHA InfoCard	100.039.815
EC Number	243-813-8;
PubChem CID	119079;
UNII	97E960G9RP ;
CompTox Dashboard (EPA)	DTXSID20174373 ;
	InChI InChI=1S/4O.Ru Key: GJFMDWMEOCWXGJ-UHFFFAOYSA-N;
	SMILES O=[Ru](=O)(=O)=O;
Properties
Chemical formula	RuO4
Molar mass	165.07 g/mol
Appearance	yellow easily melting solid
Odor	pungent
Density	3.29 g/cm3
Melting point	25.4 °C (77.7 °F; 298.5 K)
Boiling point	40.0 °C (104.0 °F; 313.1 K)
Solubility in water	2% w/v at 20 °C
Solubility in other solvents	Soluble in; Carbon tetrachloride; Chloroform
Structure
Molecular shape	tetrahedral
Dipole moment	zero
Hazards
NFPA 704 (fire diamond)	3 0 1
Safety data sheet (SDS)	external MSDS sheet
Related compounds
Related compounds	Ruthenium dioxide ; Ruthenium trichloride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Ruthenium tetroxide is the inorganic compound with the formula RuO₄. It is a yellow volatile solid that melts near room temperature. It has the odor of ozone. Samples are typically black due to impurities. The analogous OsO₄ is more widely used and better known. It is also the anhydride of hyperruthenic acid (H₂RuO₅). One of the few solvents in which RuO₄ forms stable solutions is CCl₄.

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