AMMONIA, ANHYDROUS LIQUID Chemical compatibility with O-rings, rubbers, & plastics

Anhydrous liquid ammonia, also referred to as liquid ammonia or NH3, is a pressurized, colorless liquid with a sharp, pungent odor widely used as a nitrogen fertilizer and industrial refrigerant. In agricultural settings, ammonia (NH3) is injected into soil to deliver a concentrated nitrogen source for crop growth. It also serves as a key feedstock in chemical manufacturing processes. From a chemical compatibility standpoint, anhydrous liquid ammonia must be carefully evaluated with rubber O-rings and gaskets, as certain rubber materials may harden, crack, or degrade under exposure. Because liquid ammonia is highly toxic and corrosive, proper storage systems, ventilation, PPE, and material selection are critical to ensure safe operation and long-term performance of O-rings, rubber seals, and gaskets.

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