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High-purity ammonia

Air Liquide manufactures pure ammonia gas to be used in a variety of applications, including chemical synthesis and as a refrigerant. Ammonia is also available as a component in various Scott™ brand specialty gas mixtures, including EPA protocols for environmental applications.


Scott brand ammonia in nitrogen gas mixtures are used as span gas calibration mixtures in engine emissions testing in the automotive industry. They are Part 86 compliant.


EPA Protocol Gases: Ammonia gas mixtures are manufactured as Scott™ brand EPA protocol gases and are instrumental in helping you avoid non-compliance fines and downtime caused by inaccurate instrument calibration. Air Liquide’s specialty gas manufacturing facilities are registered participants of EPA’s Protocol Gas Verification Program (PGVP). Protocol standards are dual-analyzed, and for each reactive component, two separate analyses are performed and analyzed directly against metrology institute standards to determine their concentrations. Certificates of Accuracy (COA) are provided with each cylinder.

Title V Ammonia Gas Mixtures: Use of Air Liquide’s ammonia standards helps to ensure compliance with federal regulations and provides the highest possible accuracy and confidence when measuring ammonia during CEMs certification. Air Liquide is the only specialty gas manufacturer offering ammonia standards designed for compliance with EPA Conditional Method 27e. Recommended for coal-fired boilers and other stationary emission sources, Scott brand Title V Ammonia Standards are traceable to Metrology Institute Standards (MIS) and are available in a balance gas of air or nitrogen. Ammonia concentrations are confirmed using EPA Conditional Method 27e, the wet chemistry testing method for certification and auditing of ammonia emissions. In addition, Air Liquide is actively involved in EPA calibration gas issues, and all five of our specialty gas facilities are registered participants of EPA’s Protocol Gas Verification Program (PGVP).

CEM DAILY STANDARDS: These gas standards are often used in air monitoring applications where the use of EPA protocol gases is not required. Zero blend tolerance is available thanks to our proprietary ACUBLEND™ technology. As a result, multiple cylinders exhibiting identical concentrations can be ordered, minimizing the need to recalibrate each time you change out a cylinder. Ammonia gas mixtures are also available as CEM 2% DAILY STANDARDS, providing a consistent ±2% analytical accuracy for those gas mixtures. This accuracy is comparable to the ±2% minimum accuracy requirement of an EPA protocol gas mixture. You can use these standards to maximize daily CEM performance in applications where ±1% analytical accuracy is either unavailable or not necessary.

  • Product Specifications

Ammonia Pure Gas Grades
Ammonia Gas Mixtures

Related Supply Modes

Air Liquide packages ammonia pure gas and Scott brand gas mixtures in a variety of high-pressure cylinders, including stainless steel, aluminum and nonreturnable Mini-Mix cylinders, depending on the grade of pure gas or the concentration range of your gas mixture, and your application.

Related Equipment

Air Liquide manufactures gas handling equipment designed to deliver your ammonia specialty pure gases and gas mixtures safely to your point of use, including regulators and single-station gas manifolds.