Classification: Molybdenum disulphide is hazardous to people and to environment. The product does not have labelling obligations, but nevertheless, the safety standards must be respected. 

Classification: Manganese trioxide may cause serious damage to the health after prolonged exposure by inhalation and swallowing; manganese trioxide is irritating to eyes and the respiratory system.

Uses: Molybdenum trioxide is frequently found in nature but always in the form of molybdite. Molybdenum trioxide is used as a catalyst for desulphurisation reactions and as raw material for production of pigments in the ceramic industry and for the production of frits.

Uses: 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. Ammonium molybdate is used in various sectors: to decorate ceramics, in chemical analysis to find the presence of phosphates, arsenics, lead. In the chemical industry as a source of molybdenum ions. Ammonium molybdate tetrahydrate is also used as catalyst in the preparation of dehydrogenation and desulphurisation; in the fixing of metals and in electroplating.

Classification: Molybdic acid causes burns and is corrosive.