Stannous oxide is primarily used in the production of tin-based ceramics and glass, where it acts as a reducing agent and provides a unique opacity and color. It is also employed in the manufacturing of ruby glass, giving it a distinctive red hue. In the electronics industry, it serves as a precursor for creating conductive coatings and electrodes, particularly in the fabrication of capacitors and sensors. Additionally, stannous oxide is utilized in certain chemical reactions as a catalyst, especially in organic synthesis processes. Its application extends to the creation of specialized pigments and coatings, where it enhances durability and aesthetic properties.