Another factor that makes inventory different from other assets is that its usefulness can actually diminish over time. Cash, for instance, maintains its usefulness to you over time.
Lethal injection is done by using three chemicals. The chemicals are usually sodium thiopental (an anesthetic), pancuronium bromide (used to paralyze the person being injected), and potassium chloride (to stop the heart so that the person being injected dies).
In federal executions, the method is lethal injection, which was the method used in all three of the federal executions in the modern era have been by lethal injection carried out in a federal facility in Indiana. Apparently, a three-drug combination was used, though prison officials did not reveal the exact ingredients.