Monosodium xenate

Monosodium xenate is the sodium salt of xenic acid with formula NaHXeO₄. It is a powerful oxidizer, owing to being a highly reactive compound of xenon.^[2]

Monosodium xenate

One sodium cation and one xenate anion Ball-and-stick model of the component ions
Identifiers
3D model (JSmol)	Interactive image
InChI InChI=1S/Na.HO4Xe/c;1-5(2,3)4/h;1H/q+1;-1 Key: PTXWSTYDNKDRED-UHFFFAOYSA-N
SMILES [Na+].O[Xe](=O)(=O)[O-]
Properties
Chemical formula	NaHXeO4
Molar mass	219.29 g/mol
Appearance	White solid
Solubility in water	Soluble, decomposes in water[1]
Solubility	insoluble chloroform, methanol, ethanol, and carbon tetrachloride[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	extremely unstable, vigorous oxidizer
NFPA 704 (fire diamond)	4 0 4 OX
Flash point	Non-Flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Monosodium xenate can be made by mixing solutions of xenon trioxide and sodium hydroxide, followed by freezing to liquid nitrogen temperatures, and dehydrating in a vacuum.^[1]

Properties

Monosodium xenate usually exists in the sesquihydrate form, with 1.5 waters of hydration per unit molecule. It is stable up to 160 °C heated in a pure state. However it can explode when subjected to mechanical shock, or lower temperatures when mixed with XeO₃.^[1] Sodium xenate is slightly toxic with a median lethal dose between 15 and 30 mg/kg of body weight in mice. Xenate leaves the body very quickly. In mice, the level in blood drops by half in twenty seconds due to it being decomposed and exhaled. In the peritoneum the half-life extends to six minutes.^[3]

The dialkali xenates XeO₄^2- have not been discovered, as xenate disproportionates in more alkaline conditions, hence it being rare to the find the dialkaline salt Na₂XeO₄.^[1]