Cu2O, or cuprous oxide, is a red or reddish-brown solid that occurs naturally as a mineral. It is composed of copper and oxygen, with two copper atoms for every one oxygen atom. This compound is often used in various applications, including as a semiconductor in electronics and as a pigment in ceramics and glass. In addition to its industrial uses, Cu2O plays a role in agriculture as a fungicide. It can help protect crops from certain fungal diseases. Its unique properties make it an important material in both scientific research and practical applications.