Nickel salts are chemical compounds that contain nickel combined with other elements, typically forming ionic compounds. They are often used in various industrial applications, including electroplating, battery production, and as catalysts in chemical reactions. Common nickel salts include nickel sulfate, nickel chloride, and nickel acetate. These salts can be found in different forms, such as hydrated or anhydrous, and their properties vary based on their composition. Nickel salts are important in the production of alloys and can also be used in the manufacturing of pigments and dyes. However, they should be handled with care due to potential toxicity.