Uranyl acetate

Uranyl acetate

Chembox new
Name = Uranyl acetate
ImageFile = Uranyl_Acetate_10_3_07.jpg
ImageName = uranyl acetate
IUPACName = Uranium bis(acetato)-O)dioxo-dihydrate
OtherNames = Uranium acetate
Section1 = Chembox Identifiers
CASOther = [541-09-3]
Section2 = Chembox Properties
Formula = (UO2(CH3COO)2·2H2O)
MolarMass = 424.15
Solvent = other solvents
SolubleOther = 7.694g/100gH2O
MeltingPt =
BoilingPt =
Section7 = Chembox Hazards
ExternalMSDS = [http://www.laddresearch.com/wsmsds/23620.htm External MSDS]

Uranyl acetate (UO2(CH3COO)2·2H2O) is a yellow free-flowing crystalline solid of yellow rhombic crystals with a slight acetic odor.

It is used as a negative stain in electron microscopy. In fact, most procedures in electron microscopy for biology require the use of uranyl acetate. 1% and 2% uranyl acetate solutions are used as an indicator, and a titrant in stronger concentrations in analytical chemistry, as it forms an insoluble salt with sodium (the vast majority of sodium salts are water-soluble). Uranyl acetate solutions show evidence of being sensitive to light, especially UV and will precipitate if exposed.

Uranyl acetate is also used in a standard test—American Association of State Highway and Transportation Officials (AASHTO) Designation T 299—for alkalai-silica reactivity in aggregates (crushed stone or gravel) being considered for use in cement concrete.

Commercial preparations of uranyl acetate are made from depleted uranium and have a typical radioactivity of 0.37 - 0.51 µCi/g. This mild radioactivity level is not sufficient to be harmful while the material remains external to the body. However it is very toxic by ingestion and if inhaled as dust or by skin contact if skin is cut or abraded and there is a danger of cumulative effects from long term exposure.

References

External links

* [http://education.jlab.org/itselemental/ele092.html Uranium Facts]


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