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Robbins Umeda LLP Announces an Investigation of Arch Chemicals, Inc.

SAN DIEGO--(BUSINESS WIRE)--Robbins Umeda LLP, a shareholder rights litigation firm has commenced an investigation into possible breaches of fiduciary duty and other violations of state law by members of the board of directors of Arch Chemicals, Inc. (NYSE:ARJ) in connection with their efforts to sell the company to Lonza Group Ltd. (SIX:LONN).