Copper oxychloride, also known as cupric oxychloride or basic copper chloride, is an inorganic compound with the chemical formula CuCl2·3Cu(OH)2. It is composed of copper, chlorine, and hydroxide ions. Copper oxychloride is typically found as a greenish-blue crystalline solid and is commonly used as a fungicide and agricultural pesticide.

Preparation of Copper Oxychloride: Copper oxychloride can be prepared by reacting copper sulfate (CuSO4) with sodium chloride (NaCl) in the presence of sodium hydroxide (NaOH):

CuSO4 + 4 NaOH + 2 NaCl → CuCl2·3Cu(OH)2 + 3 Na2SO4

Properties and Uses of Copper Oxychloride:

• Fungicide: Copper oxychloride is widely used in agriculture as a fungicide to control various fungal diseases on crops, including fruits, vegetables, and ornamental plants.
• Agricultural Pesticide: It also has some insecticidal properties and is used to control certain pests in agricultural settings.
• Stability: Copper oxychloride is relatively stable and less soluble in water compared to other copper compounds, making it suitable for use as a foliar spray on plants.

Safety Considerations: Copper oxychloride is generally considered to be of low toxicity to humans and animals when used properly. However, as with all chemicals, it should be handled with care, and safety precautions should be followed. It is essential to follow the recommended application rates and guidelines to prevent any potential harmful effects on humans, animals, and the environment.

As with any pesticide or agricultural chemical, it is crucial to adhere to the regulations and guidelines set by local authorities and use copper oxychloride responsibly and in accordance with the product label instructions.