Boron trioxide, or B2O3, is a chemical compound made up of boron and oxygen. It appears as a white, glassy solid and is commonly used in the production of glass and ceramics. B2O3 serves as a flux, lowering the melting point of silica and improving the durability of glass products. In addition to its role in glassmaking, B2O3 is utilized in various industrial applications, including the manufacture of fiberglass and as a component in certain types of adhesives. It also has applications in the electronics industry, where it is used in the production of semiconductors and other materials.