Monosodium xenate

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Monosodium xenate
Monosodium xenate diagram (corrected).png
One sodium cation and one xenate anion
Ball-and-stick model of the component ions
Molar mass 241.27 g/mol
Appearance White solid
Soluble, decomposes in water[1]
Solubility insoluble chloroform, methanol, ethanol, and carbon tetrachloride[1]
Occupational safety and health (OHS/OSH):
Main hazards
extremely unstable, vigorous oxidizer
NFPA 704 (fire diamond)
Flash point Non-Flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Monosodium xenate is the sodium salt of xenic acid with formula NaHXeO4·1.5H2O. It is a powerful oxidizer. It is a highly reactive compound of xenon.[2] The dialkali xenates do not appear to exist, as xenate disproportions in more alkaline conditions.[1]


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]


Monosodium xenate is stable when heated to 160 °C 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 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.[3]


  1. ^ a b c d e Spittler, T. M.; Jaselskis, Bruno (August 1965). "Preparation and Properties of Monoalkali Xenates". Journal of the American Chemical Society. 87 (15): 3357–3360. doi:10.1021/ja01093a013.
  2. ^ Peterson, Jeffrey L.; Claassen, Howard H.; Appelman, Evan H. (March 1970). "Vibrational spectra and structures of xenate(VI) and perxenate(VIII) ions in aqueous solution". Inorganic Chemistry. 9 (3): 619–621. doi:10.1021/ic50085a037.
  3. ^ Finkel, A. J.; Miller, C. E.; Katz, J. J. (April 1968). "Metabolic and Toxicological Effects of Water-Soluble Xenon Compounds Are Studied" (PDF). Atomic Energy Commission USA.