The chemical formula of blue tungsten oxide is WO2.9, and its appearance is dark blue powder.

Blue tungsten oxide can be used to produce tungsten powder, and then to produce tungsten products such as cemented carbide, pure tungsten and tungsten alloy products.

The purity of high purity tungsten powder is 5N or 6N, and it is obtained by reducing high-purity ammonium paratungstate. High-purity tungsten powder and its silicide are used to prepare metal targets, used as resistance layers, diffusion barriers, etc. in ultra-large-scale integrated circuits, and as gate materials and connection materials in metal oxide semiconductor transistors.

Tungsten dioxide, also known as brown tungsten oxide, has a chemical formula of W O 2 and is insoluble in water, alkaline solution, hydrochloric acid and dilute sulfuric acid. It is a brown monoclinic powder crystal. Tungsten dioxide is unstable and is quickly oxidized to tungsten trioxide in the air. Tungsten powder can be produced by hydrogen reduction.

The chemical formula of tungsten disulfide is WS2. It can be used as a lubricant, especially as a solid lubricant under high temperature, high pressure, high load and high vacuum conditions. It performs better than molybdenum disulfide and has a lower friction coefficient and greater compressive strength.