The ammonia refrigeration process has seen little change since the early 20th century. There are certain risks resulting from ammonia for refrigeration systems. However, the danger always exists that exposure will occur due to a leak or catastrophic release of Anhydrous Ammonia from a refrigeration system. 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. in the workplace. Refrigerant grade anhydrous ammonia is a clear, colorless gas or liquid and about 99.95% pure. 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). Concerns, Cautions and Considerations. The odor of ammonia is widely recognized. The Dangers of Ammonia. Problematic procedures may be to blame. Exposure to 300 ppm is immediately dangerous to life and health. Any business operating a chiller with ammonia is … This means that, if released, ammonia can be a danger to the immediate environment. While ammonia’s benefits are numerous, its dangers cannot be trivialized. Ammonia is considered a high health hazard because it is corrosive to the skin, eyes, and lungs. Ammonia is classified as a Water Hazard Class 2 substance. ammonia refrigeration systems to gather information on safety practices and technologies and to share its knowledge with these facilities. Refrigerant grade anhydrous ammonia is a clear colorless gas or liquid and is considered an irritant. 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. These units can vary in complexity and effectiveness, but generally are capable of operating continuously. 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. It is used to create a cool environment that helps keep products fresh and prevent bacterial growth. The purity of the anhydrous ammonia is vital to the properties that make it a good refrigerant. 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. In addition, over the past 2 years, Region III has Ammonia refrigeration works much like Industrial Refrigeration systems using synthetic refrigerants, with the major exception being that it uses anhydrous ammonia as the refrigerant. Sometimes called ammonia regenerators, can be integrated directly into the refrigeration system. 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