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Molybdenum is a chemical element with symbol Mo and atomic number 42. Molybdenum does not occur naturally as a free metal on Earth; it is found only in various oxidation states in minerals.
M 2305 (OTTO) Molybdenum foil, 0.1 mm thick, 99.9% Cas 7439-98-7 - used for heat and x-ray shielding, production of drawn parts, electronic components.