Definition: Arsenobismite, also known as a saponin or "saponification," is a naturally occurring compound that forms when certain metals (such as lead or tin) are chemically bound to another metal. In this case, it's used for industrial purposes and can be used in a variety of applications such as paper production, paint, and fertilizers. The word "arsenobismite" comes from the Latin phrase meaning "to bind" because it's bonded to another element. This compound is not chemically reactive but rather acts as a catalyst when combined with metals or other substances for chemical reactions.