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美國Avantor Performance Materials (原名Mallinckrodt Baker ) 
Mallinckrodt Baker公司是一家全球的微電子、實驗室、生物技術以及制藥化學產品的生產商。符合ISO 9001、ISO 9002認證。我們的產品被全球的半導體芯片制造商使用。從50年代早期，J.T.Baker就和第一個晶體管制造商一起工作，我們的微電子產品就為工業級清洗提供解決方案。
象其他J.T.Baker 化學產品一樣, 微電子化學產品也基于堅定奉獻給客戶優異的品質和深層的技術服務。
很難將長長的產品清單中不同級別的產品通過簡單的分類以滿足您嚴格的要求。我們通過比較了不同級別的酸和溶劑以使您更容易的選擇您的所需。我們的產品分為一下幾種級別：CMOS?, Finyte?, Finyte?-1 和 ULTRYTE? 級等。
 
In 1995, Mallinckrodt Chemical and J.T.Baker formed Mallinckrodt Baker, Inc., a remarkable global chemical company that offers two great brands - the Mallinckrodt and J.T.Baker brands of high purity products for the laboratory, biopharmaceutical, microelectronic and industrial markets. Mallinckrodt Baker’s brands are synonymous with high quality and consistency.

We are a basic manufacturer of chemicals with plant infrastructure to enable us to meet customers’ demands for increasingly purer products. We operate plants and distribution centers around the globe, in Deventer, The Netherlands; Mexico City, Mexico; and Kuala Lumpur, Malaysia as well as our US based operations in Phillipsburg, New Jersey and Paris, Kentucky.

Mallinckrodt Baker is a unit of Covidien.

Mallinckrodt Baker, Inc., based in Phillipsburg, NJ, USA, manufactures and markets high purity fine chemicals under the Mallinckrodt and J.T.Baker brands for the laboratory, biopharmaceutical, microelectronic, and industrial markets.