Copper(II) sulfate hexahydrate, often represented as CuSO4·6H2O, is a blue crystalline solid commonly used in laboratories and agriculture. It consists of one copper ion, one sulfate ion, and six 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 pesticide in farming. Additionally, it serves as a reagent in various chemical reactions and is utilized in educational settings for experiments involving crystallization and chemical properties.