Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium).
I 0081 (OTTO) Iridium powder, -22 mesh, 99.99% Cas 7439-88-5 - used as catalysts in the Cativa process for carbonylation of methanol to produce acetic acid. I 0081 (OTTO) Iridium powder, -22 mesh, 99.99% Cas 7439-88-5 - used in tips of ballpoint pens. I 0081 (OTTO) Iridium powder, -22 mesh, 99.99% Cas 7439-88-5 - used as a catalyst for carbonylation of methanol to create acetic acid.