Matheson Tri-Gas
- Supplier of gases and gas handling equipment to meet the needs of the semiconductor, analytical and industrial markets.
- http://www.mathesontrigas.com

Mesa Specialty Gases & Equipment
- Supplies calibration standards to the refinery and petrochemical industries. Products include refinery standards, environmental standards, instrument-grade pure gases, and associated equipment. Based in California.
- http://cal-gas.com

Budo Gas
- Produces sulfur dioxide in Albania, and distributes to customers in Greece and abroad. Product is used as a disinfectant in various food industries.
- http://www.budogas.com/

PowerSource Inc.
- Wholesale supplier of disposable gas cartridges in New York, offering atmospheric gases, nitrous oxide, carbon dioxide, and helium in sizes of 1-100 ml.
- http://www.powersourceny.com

GG Gastec e.K.
- German company specializing in the trade of xenon, also offering procurement of other specialty gases and gas distribution and storage equipment.
- http://www.gg-gastec.com/

Spec Gas Incorporated
- Manufacturer of high-purity noble gases and calibration standards in disposable cylinders for point-of-use applications. Also sells regulators and valves, and refills customer-owned cylinders. Located in Pennsylvania.
- http://www.specgasinc.com/

GHC Gerling, Holz & Co.
- Manufactures and supplies refrigerants, specialty gases, and high-purity hydrocarbons, as well as antifreeze products and ion-exchange resins, and provides related services and equipment. Located in Germany.
- http://www.ghc.de

SAES Pure Gas Technologies
- Develops ultra pure gas handling equipment for the semiconductor and other high technology markets, supplying gas purifiers and analyzers for many bulk and specialty gas applications.
- http://www.puregastechnologies.com/

Chemgas
- Provides isotopic noble gases and laser gas mixtures.
- http://www.helium-3.com

Spectra Gases
- Manufacturer of rare, excimer laser, stable isotopic and environmental gases and gas mixtures.
- http://www.spectra-gases.com/

Nova Gas Technologies, Inc.
- Manufacturer of excimer laser gas mixtures for semiconductor manufacturing and vision correction systems. USA.
- http://www.lasergas.com

Specialty Gases of America, Inc.
- Importer, exporter and distributor of high purity specialty and rare gases.
- http://members.aol.com/thegasgods/

Specialty Gas Report
- Serving the needs of specialty gas distributors and laboratory managers.
- http://www.specgasreport.com

Scott Specialty Gases
- International producer and supplier of all types of high-purity gases, gas mixtures, gas generators, and gas handling equipment for industrial, scientific, laboratory, electronics, medical, environmental, and petrochemical applications. Includes product s
- http://www.scottgas.com/

Gasco Affiliates llc
- Provides precision gas mixtures for gas detectors, to NIST standards, for flow regulators, gas generators. Enables accurate calibration of monitors.
- http://www.gascogas.com/

MESA Specialty Gas & Equipment
- Global supplier of specialty gases, calibration gas, rare gases, hydrocarbon gas standards for instrument calibration. Additional products include specialty gas regulators and specialty gas equipment. Santa Ana, California.
- http://www.mesagas.com/

Conley Gas, Inc.
- Supplier of pure gases to serve the specialty gas industry with multiple locations in the United States. Offers technical and shipping information on products.
- http://www.conleygas.com/

Advanced Specialty Gases, Inc.
- Offers high purity inert, fluorinated and hydrocarbon gases and gas mixtures. Site includes material safety data sheets for all products.
- http://www.advancedspecialtygases.com/