M 2328 (OTTO) Molybdenum trioxide, for molecular biology grade, 99%+ Cas 1313-27-5 - used in the solid state synthesis of a reduced molybdenum oxide. M 2328 (OTTO) Molybdenum trioxide, for molecular biology grade, 99%+ Cas 1313-27-5 - used as a catalyst in the oil industry. It is also used to make metal molybdenum. It has a wide band gap type semiconductor with distinctive electrochromic, thermochromic, and photochromic properties, has been widely investigated as smart materials for catalysis sensors, lubricants, lithium battery, organic solar cells, and display materials.