Koppers Holdings Inc. provides carbon compounds, and chemicals and treated wood products and services in the United States and internationally. The company operates through three segments: Carbon Materials and Chemicals, Railroad and Utility Products and Services, and Performance Chemicals. The Carbon Materials and Chemicals segment manufactures carbon pitch, a raw material used in the production of aluminum and steel; naphthalene used in the production of phthalic anhydride and as a surfactant in the production of concrete; phthalic anhydride for the production of plasticizers, polyester resins, and alkyd paints; creosote used in the treatment of wood; and carbon black feedstock for use in the production of carbon black, as well as sells refined tars, benzole, and specialty chemicals. The Railroad and Utility Products and Services segment procures and treats crossties, switch ties, and various types of lumber used for railroad bridges and crossings. It also provides rail joint bars to join rails together for railroads; transmission and distribution poles for electric and telephone utilities; and pilings. The Performance Chemicals segment develops, manufactures, and markets wood preservation chemicals, including micronized copper quaternary and micronized copper azole, alkaline copper quaternary, and chromated copper arsenate for wood treaters that to produce treated lumber for decking, fencing, vineyards, and various other applications. The company serves the aluminum, railroad, specialty chemical, utility, rubber, concrete, steel, residential lumber, and agricultural industries. Koppers Holdings Inc. was founded in 1988 and is headquartered in Pittsburgh, Pennsylvania.