Uranyl formate

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Uranyl formate
3D model (JSmol)
ECHA InfoCard 100.037.315
Molar mass 378.08 g/mol
Appearance fine yellow powder
Melting point 110 °C (230 °F; 383 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Uranyl formate (UO2(CHO2)2·H2O) is a fine yellow free-flowing powder occasionally used in transmission electron microscopy.

It is occasionally used as a 0.5% or 1% aqueous negative stain in transmission electron microscopy (TEM) because it shows a finer grain structure than uranyl acetate. However, uranyl formate does not easily go into solution, and once dissolved, has a rather limited lifetime as a stain. It is quite sensitive to light, especially ultraviolet light, and will precipitate if exposed.

See also[edit]


  • 2SPI.com, compound information, retrieved May 3, 2011.