Uranyl Formate

Uranyl formate is the optimum negative stain for some TEM staining protocols

Chemical name: Uranyl formate
Chemical Formula: UO₂(CHO₂)₂•H₂O
CAS #: 16984-59-1
Melting Point: 110°C

Introduction:
All uranyl compounds are becoming more and more difficult to produce in part because of the increased surveillance of the shipment of all materials containing radioactivity, no matter how low is the level. All SPI-Chem uranyl compounds, including uranyl formate, are literally made from "depleted" uranium metal, which means whatever radioactivity is present is far less than would otherwise be the case.

Why uranyl formate?
Put simply, for some samples, the use of uranyl formate as a negative stain, vs. alternatives, such as uranyl nitrate or uranyl acetate, just gives superior results. For example, we can cite one publication: Negative staining of rat tail tendon collagen fibrils with uranyl formate, D. P. Knight, Tissue Cell. 1975;7(4):651-4.

Often times when one is doing negative staining, there is an interest in trying more than one type of uranyl stain since the different uranyl compounds seem to give different results for different samples.

Characteristics of the product:
This is a very fine ground powder, yellow in color.

Other electron dense uranyl based stains:
SPI Supplies offers a reliable supply of other hard-to-find electron dense stains, including uranyl acetate and uranyl nitrate. Let us know what other needs you might have for any uranium based compounds, we are set up to produce just about anything in the way of uranium compounds, always with depleted uranium for safety and virtually no exposure hazards.

Shipping information:
UN # 2910 Class 7

Uranyl formate

	SPI #	Each	10+, Each	In Stock
1g vial	02545-AA	$ 150.75	$ 135.68	Yes
5g vial	02545-AB	396.98	357.28	Yes

Storage condition:Room temperature.
Hazardous from the standpoint of shipping

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