Copper(II) sulfate pentahydrate, often represented as CuSO4·5H2O, is a blue crystalline solid commonly used in laboratories and agriculture. It consists of one copper ion, one sulfate ion, and five water molecules. The vibrant blue color is a distinctive feature, making it easily recognizable. This compound is soluble in water and is often used as a fungicide, herbicide, and in various chemical reactions. In addition to its agricultural applications, copper(II) sulfate pentahydrate is also utilized in electroplating and as a laboratory reagent for various experiments.