Chemical industry is a vast industry that incorporates all different types of product producing industries whose generation is based on heavy use of chemicals. Usually, industries that are involved with industrial chemical generation are broadly known as chemical industry. As per the end-products, processes or raw materials associated with chemical industries, such industry can be classified into several classes. Understanding the huge diversity of chemical producing industries, such chemical industries are usually categorized under broad categories such as inorganic and organic chemical producing industries, fertilizer industries, refining and petroleum industries, electroplating and heat treatment industries, pesticide industries, hydro generated oil/soap industries, and so on.