Koppers Holdings Inc. (Koppers Holdings), formerly as KI Holdings Inc., is an integrated provider of carbon compounds and commercial wood treatment products. Its products are used in a variety of applications in a range of end markets, including the aluminum, railroad, specialty chemical, utility, rubber, and steel industries. It operates two principal businesses: Carbon Materials and Chemicals, and Railroad and Utility Products. It processes coal tar into a variety of products, including carbon pitch, creosote, and phthalic anhydride, which are critical intermediate materials in the production of aluminum, the pressure treatment of wood and the production of plasticizers, and specialty chemicals. Through its Railroad and Utility Products business, the Company supplies railroad crossties in North America. In October 2008, Koppers Holdings sold 95% interest in Koppers Monessen Partners to ArcelorMittal S.A.