Koppers Inc. announced that it has entered into new long-term coal tar supply agreements with ArcelorMittal. Pursuant to the contracts, which have initial terms of 10 years, Koppers will purchase coal tar, a byproduct of ArcelorMittal coke plants in the United States. This contracted volume will satisfy a significant portion of the domestic raw material needs for Koppers. ArcelorMittal USA operates three coke plants to transform coal into coke, an important ingredient in the integrated steelmaking process. Coal tar is a viscous, carbon-rich liquid byproduct with a complex chemical make-up. It is a key raw material used by Koppers in the production of creosote, an oil-based wood preservative that is used in treating crossties for the railroad industry, and carbon-based chemicals.