H2TeO4, known as telluric acid, is a chemical compound composed of hydrogen, tellurium, and oxygen. It is a strong acid and is often used in various chemical reactions and processes. Telluric acid can form salts called tellurates when it reacts with bases. In its pure form, H2TeO4 is a colorless, viscous liquid. It is less common than other acids but is important in the study of tellurium chemistry. Telluric acid can also be involved in the synthesis of other tellurium compounds, contributing to research in materials science and inorganic chemistry.