Scandium foils are produced from distilled scandium that does not contain tantalum. Limits will be specified by customer service.
Europium is also water-reactive.
La, Ce, Nd, Pr and Eu foils are always shipped under mineral oil. All other foils are sealed under argon in inner plastic bags in foil pouches. All foils are subject to oxidation, although most only under elevated temperatures. Foils will deteriorate in the presence of moisture. Lead time for most foil orders is 3-4 weeks, although large orders or difficult sizes may increase lead time.