CuSO4·10H2O, commonly known as copper(II) sulfate pentahydrate, is a blue crystalline solid that consists of copper, sulfur, and oxygen. It contains ten water molecules, which are essential for its structure and properties. This compound is often used in agriculture as a fungicide and herbicide, as well as in various industrial applications. In addition to its agricultural uses, CuSO4·10H2O is also utilized in laboratories for chemical experiments and as a reagent. It can be found in educational settings for demonstrations, such as showing the effects of hydration and dehydration. Its vibrant blue color makes it easily recognizable in various contexts.