Dysprosium, one of the rare earth metals, is only mildly reactive
air. Small pieces will oxidize rapidly, but a 1" or larger target will
be safe for a day or so. ACI Alloys can supply dysprosium
and dysprosium alloys. See dysprosium in our
"materials made" page for an idea of our capabilities--also try
searching alphabetically on each of the element symbols in
the material you are looking for.
The MSDS for dysprosium can be found here.
See also dysprosium facts at the following links: