Bulletin 300: Dangers of Anhydrous Ammonia (NH3)

Bulletin 300: Dangers of Anhydrous Ammonia (NH3)

​​​​​Pure ammonia or anhydrous ammonia (NH3) is a toxic chemical most commonly found in:

  • refrigerants
  • cleaning products
  • fertilizers.

NH3 is hydroscopic, or water-seeking. When combined with moisture it forms a corrosive substance. Ammonia gas is very irritating to the eyes, nose and respiratory system, and in high concentrations is also corrosive to the skin and eyes. Breathing ammonia gas can be fatal. The level of danger depends on the concentration of ammonia and length of exposure.

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