N 0063 (OTTO) Neodymium oxide, 99.999% Cas no 1313-97-9 - used to dope glass, including sunglasses, to make solid-state lasers, and to color glasses and enamels. N 0063 (OTTO) Neodymium oxide, 99.999% Cas no 1313-97-9 used in welding goggles & some neodymium - doped glass is dichroic.