MYK Mykrolis Corp

Mykrolis Corporation Reaffirms Guidance for Second Quarter of 2004 BILLERICA, Mass., May 19 /PRNewswire-FirstCall/ -- Mykrolis Corporation today reaffirmed its previous guidance for the second quarter of fiscal 2004 ending July 3, 2004. At its analyst meeting in Billerica, Massachusetts, the company said it expects second quarter sales to be in the range of $72 to $80 million, a 2 to 13 percent increase from the first quarter of 2004. Net income per diluted share for the second quarter is anticipated to be in the range of $0.18 to $0.23, which compares to $0.16 per diluted share reported in the first quarter. About Mykrolis Mykrolis Corporation, based in Billerica, Massachusetts, is a worldwide developer, manufacturer and supplier of liquid and gas delivery systems, components and consumables used to precisely measure, deliver, control and purify the process liquids, gases and chemicals, as well as the deionized water, photoresists and vacuum systems utilized in the semiconductor manufacturing process. In addition, the Company's products are used to manufacture a range of other products, such as flat panel displays, high purity chemicals, photoresists, solar cells, gas lasers, optical disks and fiber optic cables. For more information, visit http://www.mykrolis.com/. Mykrolis Forward looking Statement Disclaimer The matters discussed herein, as well as in future oral and written statements by management of Mykrolis Corporation that are forward-looking statements, are based on current management expectations that involve substantial risks and uncertainties which could cause actual results to differ materially from the results expressed in, or implied by, these forward-looking statements. When used herein or in such statements, the words "anticipate," "believe," "estimate," "expect," "hope," "may," "will," "should" or the negative thereof and similar expressions as they relate to Mykrolis, its business or its management are intended to identify such forward-looking statements. Potential risks and uncertainties that could affect Mykrolis's future operating results include, without limitation, the risk that a sustained industry recovery may be weaker than past recoveries, our inability to meet increasing demands for our products from our key customers; increased competition in our industry resulting in downward pressure on prices and reduced margins, as well as those risks described under the headings "Risks Relating to our Business and Industry," "Risks Related to the Securities Markets and Ownership of Our Securities," and "Risks Related to our Separation from Millipore" in Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations of our Annual Report on Form 10-K for the fiscal year ended December 31, 2003. Contacts: Bertrand Loy, Chief Financial Officer Steve Cantor, Director of Investor Relations and Corporate Communications Tel#: 978-436-6500 Email: DATASOURCE: Mykrolis Corporation CONTACT: Bertrand Loy, Chief Financial Officer, or Steve Cantor, Director of Investor Relations and Corporate Communications, +1-978-436-6500, , both of Mykrolis Corporation Web site: http://www.mykrolis.com/

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