Used as a precursor in the production of tungsten metal, which is essential for manufacturing high-strength alloys and electrical components. Commonly employed in gas sensors due to its sensitivity to various gases like hydrogen and nitrogen dioxide. Applied in electrochromic devices, such as smart windows, where it changes color in response to an electric current, helping control light and heat transmission. Utilized as a pigment in ceramics and paints for its yellow to orange color and stability at high temperatures. Also investigated for use in photocatalytic water treatment and solar energy conversion due to its semiconductor properties.