Molybdenum

Molybdenum is naturally found in the earth's crust and is not a free element. Molybdenum has many colors; as a compact mass it is a silvery white metal, while in powder form, it has a dull grey color. Industrially, Molybdenum is used mainly in the production of steels, cast iron and tools. Molybdenum is also used in the production of anodes as well as a catalyst in the oil industry for removing sulfurs, nitrogen, and noxious metals.

molybdenum trioxide

Mo

  • Family Mo (Molybdenum)
  • CAS registry number 1313-27-5
  • Formula MoO3

Molybdenum trioxide is frequently found in nature but always in the form of molybdite.

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molybdic acid

Mo

  • Family Mo (Molybdenum)
  • CAS registry number 7782-91-4
  • Formula H2MoO4

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Ammonium molybdate

Mo

  • Family Mo (Molybdenum)
  • CAS registry number 12054-85-2
  • Formula (NH4)6Mo7O24.4H2O

Ammonium heptamolybdate is easily prepared by dissolving molybdenum trioxide in an excess of aqueous ammonia and evaporating the solution at room temperature. While the solution evaporates, the excess of ammonia escapes. This method results in the formation of six-sided transparent prisms of the tetrahydrate of ammonium heptamolybdate. Solutions of ammonium paramolybdate react with acids to form molybdic acid and an ammonium salt. The pH value of a concentrated solution will lie between 5 and 6.

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molybdenum disulfide

Mo

  • Family Mo (Molybdenum)
  • CAS registry number 1317-33-5
  • Formula MoS2

Molybdenum disulphide is naturally found in the form of molibdnite mineral and has an appearance very similar to graphite. Molybdenum sulphide is not very soluble in water while it easily dissolves in acqua regia (mixture of nitric acid and hydrochloric acid) and hot water in some inorganic acids like nitric, sulphuric and hydrochloric acid. In its pure state, this product is used as a lubricant.

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sodium molybdate

Mo

  • Family Mo (Molybdenum)
  • CAS registry number 10102-40-6
  • Formula Na2MoO4.2H20

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