t is a chemical element in the periodic table, expressed by the symbol Mn, and its atomic number 25. It is found in nature as an element (often with iron) or in other minerals. If it is a free element, it is of great importance in the field of industry, especially in the steel industry. Manganese use: 1- Iron alloy with manganese is used in the manufacture of railways. 2- It is used in making dry column. 3- Manganese sulfate is used as a fungicide. 4- It is used in making ferromanganese alloy and hard alloys. 5- Refractory industry. 6- It is used in chemical industries. 7- It is used in building materials industry.