Rigrodsky & Long, P.A. announces that it is investigating potential claims against the board of directors of Dionex Corporation (“Dionex” or the “Company”) (Nasdaq: DNEX) concerning possible breaches of fiduciary duty and other violations of law related to the Company’s entry into an agreement to be acquired by Thermo Fisher Scientific in a transaction with an approximate value of $2.1 billion.

Under the proposed agreement, Thermo Fisher Scientific will commence a tender offer to acquire all of the outstanding shares of Dionex common stock for $118.50 per share in cash. The investigation concerns whether Dionex’s board of directors failed to adequately shop the Company and obtain the best price possible for Dionex’s shareholders before entering into the agreement with Thermo Fisher Scientific.

If you own the common stock of Dionex and purchased your shares before December 13, 2010, if you have information or would like to learn more about these claims, or if you wish to discuss these matters or have any questions concerning this announcement or your rights or interests with respect to these matters, please contact Seth D. Rigrodsky, Esquire or Noah R. Wortman, Case Development Director, of Rigrodsky & Long, P.A., 919 N. Market Street, Suite 980, Wilmington, Delaware, by telephone at (888) 969-4242, or by e-mail to info@rigrodskylong.com.

Rigrodsky & Long, P.A., with offices in Wilmington, Delaware and Garden City, New York, regularly litigates securities class, derivative and direct actions, shareholder rights litigation and corporate governance litigation, including claims for breach of fiduciary duty and proxy violations in the Delaware Court of Chancery and in state and federal courts throughout the United States.

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