Phillipsburg, New Jersey – Avantor™ Performance Materials has completed its acquisition of POCH S.A. from Kulczyk Holding S.A. Terms of the deal were not disclosed. The POCH acquisition complements Avantor’s strategy of growing into new markets and geographies, both organically and through acquisition. Avantor announced its intent to acquire POCH S.A. in April, 2011.

Avantor, formerly Mallinckrodt Baker, manufactures and markets high-performance chemistries and materials around the world under several well-respected brand names, including the J.T.Baker®, Macron™, Rankem™ and Diagnova™ brands. Avantor products are used in a wide range of industries including biotechnology and pharmaceutical production; electronics and photovoltaic manufacturing; and in research, academic and quality control laboratories. The company is owned by an affiliate of private equity firm New Mountain Capital.

Based in Poland, POCH S.A. manufactures products designed for use in classic and instrumental analysis, filtration and microbiology. POCH S.A. also sells laboratory equipment and laboratory glass. In addition, the company manufactures solvents for liquid and gas chromatography and spectroscopy as well as anhydrous solvents. Its markets include pharmaceuticals; food and feed; chemical and petrochemical; environmental protection and research and analytical chemistry.

“POCH is a perfect fit for Avantor because it strengthens our capabilities in Eastern Europe with its expansive manufacturing presence and distribution facility already in place,” said Avantor President and Chief Executive Officer Jean-Marc Gilson. “As we formally integrate POCH into our organization, we plan to build upon that strong foundation by enhancing our products, support and services to customers in the region.”

“Working closely with Avantor presents us with a unique opportunity to collaborate on an enriched product portfolio while also leveraging our proven manufacturing and distribution capabilities,” said POCH S.A. Chief Executive Officer Jaros?aw Bieszczad. “Becoming part of an established global leader also benefits our customers, who will now have access to Avantor’s high-quality product line and global support system.”

Fried, Frank, Harris, Shriver & Jacobson LLP and Wardynski & Partners acted as legal advisors to Avantor and New Mountain Capital.

DC Advisory Partners acted as the sole financial advisor and Clifford Chance as legal advisor to Kulczyk Holding.

Visit www.avantormaterials.com or www.poch.com.pl for more information.