Middlesex Gases has over 35 years of experience manufacturing and analyzing specialty gases for biotechnology and life science companies. From start-ups to Fortune 100 companies, Middlesex Gases offers customized solutions for all applications. Our extensive gas distribution network services Massachusetts, New Hampshire, Rhode Island and Connecticut. Presently, we have three gas filling and testing facilities in Everett, Lowell and Plainville, Massachusetts. Our state-of-the-art specialty gas laboratory located in Everett, MA is capable of Automatic and Gravimetric filling of both nonflammable and flammable gas mixtures. With over one million dollars invested in our plant, Middlesex Gases guarantees precise and accurate results every time we fill a specialty gas, leading to a faster delivery time for our customers. Gas products include: High Purity, Ultra High Purity, Research Grade and over 50 custom blends. Explore our full list of specialty gases.