Indium is a chemical element with symbol In and atomic number 49. It is most notably used in low melting point metal alloys such as solders, in soft metal high vacuum seals, and in the production of transparent conductive coatings of indium tin oxide (ITO) on glass.
I 5757 (OTTO) Indium foil, 0.25 mm thick, 99.999% Cas 7440-74-6 - used as an extremely efficient heat sink for high temperature and cryogenic applications.