Terbium hydride is a chemical with CAS number 13598-54-4 and molecular weight 161.9492. Terbium hydride is an unstable compound that easily reacts with water vapor in the air and releases toxic hydrogen, so proper protective measures need to be taken when handling it. Terbium hydride can be used as a raw material for the study of terbium compounds, and as a catalyst and a component of hydrogen storage materials in some scientific studies. It is usually prepared by reacting terbium with hydrogen. Although the field of application of terbium hydride is relatively narrow, it has an important role in related fields.