Koppers Signs Sales Contract Extension With Rio Tinto; Total Value in Excess of $100M

A subsidiary of Koppers Holdings Inc.

and Rio Tinto Aluminium Limited have agreed to a 42-month contract extension that begins January 1, 2011, and continues through June 30, 2014. Under the terms of the agreement Koppers will supply and transport liquid carbon pitch to Rio Tinto smelters in Australia at a total estimated value in excess of $100 million over the contract period.