Copper oxychloride is widely used as a fungicide and bactericide in agriculture to protect crops from fungal and bacterial infections. It is particularly effective against diseases like downy mildew, leaf spots, blights, and anthracnose in fruits, vegetables, ornamental plants, and field crops. The compound works by releasing copper ions, which disrupt the cellular processes of fungi and bacteria, preventing their growth and spread.

In addition to its fungicidal and bactericidal properties, copper oxychloride is utilized in the formulation of certain pesticides, providing broad-spectrum defense against various plant pathogens. Its ability to adhere well to plant surfaces ensures prolonged protection, even under adverse weather conditions.

Beyond agriculture, copper oxychloride finds application in wood preservation, where it helps prevent fungal decay in timber. It is also used in the production of certain pigments for paints and coatings, enhancing anti-fungal and anti-bacterial properties, and as a catalyst in organic synthesis reactions. Its versatility and effectiveness make it a valuable compound in both agricultural and industrial contexts.