The Petroleum Additives business of Chemtura Corporation (NYSE/Euronext: CHMT) is announcing a price increase on its calcium sulfonate complex grease (G-2000 series) products of 11 cents per kilogram effective Sept. 20, 2013, or as contracts allow. This price increase is due to recent raw material costs increases. Petroleum Additives Chemtura Petroleum Additives is a global and market-driven value innovator in supply of additives and finished lubricants for automotive and industrial applications. Additional information concerning the Petroleum Additives business is available at www.chemtura.com Chemtura Corporation Chemtura Corporation, with 2012 sales of $2.6 billion, (1) is a global manufacturer and marketer of specialty chemicals, agrochemicals and pool, spa and home care products. Additional information concerning Chemtura is available at www.chemtura.com. (1) 2012 net sales of $2.6 billion reflects discontinued operations treatment for the sale of Chemtura's plastic antioxidants business.