Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metallic element that is rare in Earth's crust. The metal is very soft, malleable and easily fusible, with a melting point higher than sodium, but lower than lithium or tin.
I 3511 (OTTO) Indium, powder, -325 mesh, 99.999% Cas 7440-74-6 - used in photovoltaics for the synthesis of the semiconductor copper indium gallium selenide (CIGS), which is used for the manufacture of CIGS solar cells, a type of second generation thin film solar cell.