Tungsten compounds are chemical substances that contain the element tungsten, which is known for its high melting point and density. These compounds can take various forms, including oxides, carbides, and sulfides, and are used in a range of applications, from industrial processes to electronics. One of the most common tungsten compounds is tungsten trioxide (WO3), which is used in the production of tungsten metal and as a pigment in ceramics. Other notable compounds include tungsten carbide (WC), known for its hardness and used in cutting tools, and tungsten disulfide (WS2), which has lubricating properties.