Niobium, formerly columbium, is a chemical element with symbol Nb (formerly Cb) and atomic number 41.
N 0542 (OTTO) Niobium, sputtering target, 99.95% (L x W x Thick 14 x 1 x 2 mm) - used in application of superalloys. Niobium is an important component of high-performance heterogeneous catalysts for the production of acrylic acid by selective oxidation of propane.