The pressure varies depending upon the temperature. For example, at 60 degrees Fahrenheit, the pressure is 93 pounds per square inch. At 100 degrees, the pressure is nearly 200 pounds per square inch. When anhydrous ammonia comes from the tank, it comes out at minus 28 degrees. As a resul , it can freeze the skin within seconds.
Anhydrous ammonia is caustic, and therefore also can burn.
Because of its high affinity for water, it readily absorbs water to create a dilute ammonium hydroxide, which is a component of lye. Anhydrous is not dangerous when handled properly, but if not handled carefully it can be extremely dangerous. It is not as combustible as many other products that we use and handle every day. However, concentrations of gas burn and require precautions to avoid fires. Mild exposure can cause irritation to eye, nose and lung tissues.