Potassium osmate

Potassium osmate
Names
	Other names Potassium osmate(VI) dihydrate
Identifiers
CAS Number	10022-66-9;
3D model (JSmol)	Interactive image;
ChemSpider	21241360;
ECHA InfoCard	100.157.189
EC Number	243-247-1;
PubChem CID	53393272;
UNII	5M2BWQ2TYJ ;
CompTox Dashboard (EPA)	DTXSID80693853 ;
	InChI InChI=1S/2K.4H2O.2O.Os/h;;41H2;;;/q2+1;;;;;2*-1;+4/p-4 Key: DDTIHYGDUUGVNU-UHFFFAOYSA-J;
	SMILES [K+].[K+].[O-][Os](O)(O)(O)(O)[O-];
Properties
Chemical formula	H4K2O6Os
Molar mass	368.42
Appearance	purple solid
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H311, H330, H331
Precautionary statements	P260, P261, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P311, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Potassium osmate is the inorganic compound with the formula K₂[OsO₂(OH)₄]. This diamagnetic purple salt contains osmium in the VI (6+) oxidation state. When dissolved in water a red solution is formed. When dissolved in dilute alcohols, the salt gives a pink solution, and it gives a blue solution when dissolved in methanol. The salt gained attention as a catalyst for the asymmetric dihydroxylation of olefins.