The odor threshold reported in literature varies. This means that, if released, ammonia can be a danger to the immediate environment. However, the danger always exists that exposure will occur due to a leak or catastrophic release of Anhydrous Ammonia from a refrigeration system. Sometimes called ammonia regenerators, can be integrated directly into the refrigeration system. Concerns, Cautions and Considerations. Last month, a 5000 pound ammonia leak occurred at a Boston-area seafood warehouse that killed one worker and forced a shelter-in-place order from Boston Police. Household ammonia, by comparison, is only about 10% ammonia by weight mixed with water. Typically use hot discharge gas or warm condensed liquid to provide an inexpensive heat source for boiling the cold contaminated liquid ammonia. in the workplace. The Dangers of Ammonia. It is used to create a cool environment that helps keep products fresh and prevent bacterial growth. Ammonia, frequently used commercially in large freezing and refrigeration plants is also called “anhydrous ammonia” because it contains almost no water (it is 99.98% pure). The true danger from ammonia occurs when a person is unable to leave a gaseous ammonia environment, and when the liquid comes in contact with the body, particularly the eyes. These units can vary in complexity and effectiveness, but generally are capable of operating continuously. As a refrigerant, ammonia has four major advantages over CFCs and HCFCs: With ammonia, because fewer pounds of refrigerant are required to do the same amount of work, generally speaking, the lower a facility’s temperature requirements, the more cost-effective ammonia becomes. Ammonia refrigeration is commonly found in cold storage, food processing and industrial applications, but the use of ammonia does extend into other markets as well, especially overseas. The ammonia refrigeration process has seen little change since the early 20th century. In addition, over the past 2 years, Region III has There are certain risks resulting from ammonia for refrigeration systems. The odor of ammonia is widely recognized. Problematic procedures may be to blame. Ammonia is considered a high health hazard because it is corrosive to the skin, eyes, and lungs. Region III has conducted more than 135 chemical safety audits from 1995 to the present of both large and small facilities using ammonia for refrigeration. A release of Anhydrous Ammonia could happen in a number of ways: physical impact to the refrigeration system, seal leaks, piping corrosion, and hydraulic shock. Ammonia refrigeration works much like Industrial Refrigeration systems using synthetic refrigerants, with the major exception being that it uses anhydrous ammonia as the refrigerant. 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