Uranyl formate
From Wikipedia, the free encyclopedia
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.037.315 |
PubChem CID |
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| Properties | |
| (UO2(CHO2)2·H2O) | |
| 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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Uranyl formate (UO2(CHO2)2·H2O) is a salt that exists as a fine yellow free-flowing powder occasionally used in transmission electron microscopy.
It is used as a negative stain in transmission electron microscopy (TEM) because it exhibits a finer grain structure than uranyl acetate. However, uranyl formate does not easily dissolve, and once in solution, it has a limited lifespan as a stain. Typical aqueous solution concentrations are 0.5% or 1%. It is highly sensitive to light, especially ultraviolet light, and will precipitate upon exposure.
