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Merck Millipore

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Former global life-science brand created by Merck KGaA after its acquisition of Millipore Corporation.

Last updated August 26, 2026

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Overview

Merck Millipore was the global life-science brand used by Merck KGaA after the German company acquired the United States-based Millipore Corporation in 2010. The business supplied technologies, consumables, services, and laboratory systems for pharmaceutical manufacturing, biotechnology, academic research, diagnostics, and industrial testing. Its portfolio combined Millipore's long-standing expertise in microporous membranes, filtration, water purification, cell analysis, chromatography, and bioprocessing with Merck KGaA's broader chemical and pharmaceutical capabilities. The brand's industrial roots reach back to the early 1950s, when researchers working with Lovell Corporation developed membrane-filtering technology initially associated with a U.S. Army Chemical Engineers project. After the technology was declassified, Jack Bush acquired the rights and established the Millipore Filter Company in 1954. The company developed commercial microporous membranes capable of separating very small particles from fluids, and the word “millipore” became closely associated with this category of filtration products. Millipore expanded internationally, built manufacturing capacity in the United States, Europe, and Ireland, and added businesses in chromatography, gas purification, cell biology, drug discovery, and biopharmaceutical processing. Several products became especially important to the company's identity. Milli-Q systems provided laboratory-grade ultrapure water, while Millex syringe filters offered a disposable format for preparing small-volume samples. Pellicon cassette systems supported biopharmaceutical separation and concentration, and Durapore membranes introduced a low-protein-binding polyvinylidene fluoride membrane platform. Through acquisitions such as Serologicals, Chemicon, Upstate, Linco, Celliance, Guava Technologies, BioAnaLab, and other specialist businesses, Millipore expanded beyond membrane filtration into antibodies, cell analysis, biologics testing, vaccine analysis, and process development. Merck KGaA completed its acquisition of Millipore in 2010 in a transaction reported at approximately €5.3 billion. The acquired operation became part of Merck's life-science activities and was known in different markets as EMD Millipore or Merck Millipore. In 2015, Merck completed its acquisition of Sigma-Aldrich and combined the two life-science operations. The resulting business was rebranded as MilliporeSigma in the United States and Canada, while the Merck brand continued to be used in many other markets. Consequently, Merck Millipore is best understood as a historical operating brand rather than a current standalone company. The business legacy remains visible in laboratory water systems, membrane filters, single-use processing equipment, chromatography products, microbiology testing, cell-analysis tools, and biopharmaceutical manufacturing technologies. Its principal customers included pharmaceutical and biotechnology companies, contract manufacturers, research organizations, universities, hospitals, and industrial laboratories. The brand's positioning centered on technical reliability, validated performance, contamination control, and support for regulated life-science workflows.

History

Merck Millipore was created in 2010 when Merck KGaA acquired Millipore Corporation, but its technological and commercial history began much earlier. In the early 1950s, Lovell Corporation developed membrane-filtering devices for separating components of fluid samples in work connected with the U.S. Army Chemical Engineers. When the relevant membrane technology became available for commercial use, Jack Bush acquired the rights and established the Millipore Filter Company in 1954. The company later adopted the name Millipore Corporation as its product range and international activities expanded. Millipore's early innovation was the microporous membrane. Its filters used very small, controlled openings to remove particles and microorganisms from fluids, creating applications in laboratory analysis, pharmaceutical production, electronics manufacturing, and research. The company received an early patent for microporous nylon film in 1955. During the 1960s it opened subsidiaries in Europe and Japan, introduced the Super-Q water-purification system, and developed Pellicon cassette technology for purification of biological products. In 1971 it introduced the Millex disposable syringe filter, and in 1973 it launched Milli-Q, a laboratory-scale ultrapure-water system that became one of its best-known product families. The company expanded its manufacturing footprint through facilities in Jaffrey, New Hampshire; Danvers, Massachusetts; Molsheim, France; and County Cork, Ireland. It also broadened its technical scope through acquisitions. Waters Associates added chromatography media and high-performance liquid-chromatography capabilities, while later acquisitions strengthened separation science, gas purification, bioprocessing, and chromatography. Millipore divested its Waters chromatography division in 1994 as it refocused on membrane and related separation businesses, then acquired Amicon's separation-science operations in 1996 and other specialist companies during the late 1990s. In the 2000s, Millipore increasingly targeted biotechnology and pharmaceutical development. It acquired or added businesses involved in contract testing, aseptic components, biopharmaceutical process containers, cell biology, antibodies, drug discovery, cell analysis, and testing of biologic drugs and vaccines. The 2006 acquisition of Serologicals expanded the portfolio through businesses including Chemicon, Upstate, Linco, and Celliance. Acquisitions of Guava Technologies and BioAnaLab later added bench-top cell-analysis systems and biologics-analysis capabilities. New research, biopharmaceutical technology, training, and manufacturing facilities were opened in the United States, Ireland, and Singapore. Millipore was a publicly traded US company for much of its independent history. It moved from over-the-counter and Nasdaq trading to the New York Stock Exchange in 1987 under the ticker MIL and had been included in the S&P 500. Merck KGaA acquired the company in 2010 in a transaction reported at approximately €5.3 billion. The acquired business became part of Merck's life-science organization and operated under the EMD Millipore name in the United States and under Merck Millipore in many international markets. The brand existed in this form for approximately five years. In 2015, Merck KGaA completed its acquisition of Sigma-Aldrich and integrated Sigma-Aldrich with Merck Millipore. The combined life-science business was renamed MilliporeSigma in the United States and Canada, while Merck branding remained in use in other geographies. This reorganization ended Merck Millipore as a distinct global brand, although its products, technologies, facilities, and trademarks continued within the successor life-science organization.

  • 2015

    Merck Millipore is combined with Sigma-Aldrich

    [1]

    Merck completed its Sigma-Aldrich acquisition and combined the businesses, replacing the Merck Millipore identity with the successor MilliporeSigma structure in the United States and Canada.

  • 2010

    Merck KGaA acquires Millipore

    [1]

    Merck KGaA acquired Millipore Corporation and incorporated it into the group's life-science business.

  • 2006

    Serologicals acquisition expands research portfolio

    [1]

    Millipore acquired Serologicals, adding businesses and capabilities in antibodies, cell biology, drug discovery, and related research markets.

  • 1987

    Millipore moves to the New York Stock Exchange

    [1]

    Millipore's shares moved from Nasdaq to the New York Stock Exchange under ticker MIL.

  • 1980

    Durapore membrane introduced

    [1]

    The company introduced a low-protein-binding polyvinylidene fluoride membrane platform under the Durapore name.

  • 1973

    Milli-Q system introduced

    [1]

    Millipore launched Milli-Q, a laboratory ultrapure-water purification system that became a core product family.

  • 1971

    Millex syringe filter introduced

    [1]

    Millipore launched the original Millex disposable syringe filter for small-volume sample preparation.

  • 1968

    Pellicon technology introduced

    [1]

    Pellicon cassette technology was introduced for purification and concentration applications involving biotherapeutic materials.

  • 1967

    Super-Q water system introduced

    [1]

    The company introduced the Super-Q laboratory water-purification system.

  • 1955

    Early microporous membrane patent

    [1]

    Millipore received an early patent covering microporous nylon film developed by Stanley Lovell and Jack Bush.

Products and positioning

A technically specialized life-science supplier focused on filtration, purification, laboratory water, bioprocessing, and analytical solutions for pharmaceutical, biotechnology, research, and industrial customers.

  • Laboratory water purification · 1973

    Milli-Q

    Milli-Q systems produce purified and ultrapure water for analytical laboratories, life-science research, pharmaceutical testing, and other controlled laboratory workflows. The product family became one of Millipore's most recognizable offerings after its introduction in 1973 and was used to manage water quality at different stages of laboratory work.

  • Disposable syringe filters · 1971

    Millex

    Millex syringe filters are small, disposable membrane-filter devices used to prepare laboratory samples before analysis or other processing. Their format was designed for convenient filtration of limited sample volumes and became an important part of Millipore's sample-preparation portfolio.

  • Bioprocess ultrafiltration and diafiltration · 1968

    Pellicon

    Pellicon cassette systems support membrane-based concentration, purification, and buffer-exchange steps in biopharmaceutical processing. The platform was developed for handling biological products and helped establish Millipore as a supplier across both upstream and downstream bioprocessing workflows.

  • Sterile filtration units

    Stericup

    Stericup systems are integrated filtration units designed for sterile filtration of laboratory media and other liquid preparations. They combine a membrane filter with a receiving vessel or compatible container format, supporting routine microbiology, cell-culture, and laboratory preparation tasks.

  • Membrane filters · 1980

    Durapore

    Durapore is a polyvinylidene fluoride membrane platform associated with low protein binding and filtration performance in laboratory and bioprocess applications. It formed part of Millipore's broader range of membrane materials used for sample preparation, sterile filtration, and biological processing.

Brand decisions

  • 2015

    Integration with Sigma-AldrichM&A

    Background

    Merck KGaA acquired Sigma-Aldrich to broaden its offering of laboratory chemicals, reagents, and life-science products.

    Action taken

    Merck combined Sigma-Aldrich with Merck Millipore and reorganized the combined life-science activities under a successor business identity.

    Aftermath

    The Merck Millipore brand was retired as a distinct global identity. In the United States and Canada, the successor operation became known as MilliporeSigma, while Merck branding continued in many other markets.

  • 2010

    Acquisition of Millipore by Merck KGaAM&A

    Background

    Millipore was an established international supplier of membrane filtration, laboratory water, separation science, and biopharmaceutical technologies. Merck KGaA sought to expand its life-science activities through the acquisition.

    Action taken

    Merck KGaA completed the acquisition and incorporated Millipore into its life-science operations, using EMD Millipore or Merck Millipore branding depending on market.

    Aftermath

    Millipore became part of Merck's global life-science business and no longer operated as an independent publicly traded company.

    Reported transaction value. Approximately EUR 5.3 billion (2010)

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