X0303 4 2009-01-28 0001072343 ARCH CHEMICALS INC ARJ 0001221033 ANDERSON HAYES C/O ARCH CHEMICALS, INC. 501 MERRITT 7 NORWALK CT 06851 0 1 0 0 Vice Pres., Human Resources Phantom Stock Units 2009-01-28 4 A 0 7400 A 2014-12-31 2014-12-31 Common Stock 7400 7400 D Phantom share units granted under the Arch Chemicals, Inc 1999 Long Term Incentive Plan which may be paid out in cash or stock at an earlier date provided certain financial measures are reached by the company. Otherwise, they are paid out in cash or stock at maturity if the officer is still employed by the company, subject to plan provisions. Each unit is the economic equivalent of one share of common stock. Joseph P. Lacerenza, Attorney in Fact 2009-01-30