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.
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.
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. Sodium xenate is slightly toxic with a medium 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.
The dialkali xenates XeO42- have not been discovered, as xenate disproportionates in more alkaline conditions, hence it being rare to the find the dialkaline salt Na2XeO4.