Anhydrous ammonia, also known as ammonia gas or NH3, is a colorless, highly pungent gas widely used as a nitrogen fertilizer and industrial refrigerant. In agricultural applications, ammonia (NH3) is injected directly into soil to supply crops with readily available nitrogen. It is also utilized in refrigeration systems and as a chemical feedstock in numerous manufacturing processes. When reviewing chemical compatibility, anhydrous ammonia exposure must be evaluated carefully for rubber O-rings and gaskets, as certain rubber materials may experience swelling, embrittlement, or degradation. Because ammonia gas is highly toxic and corrosive, strict handling procedures, proper storage systems, ventilation, and appropriate PPE are critical to protect personnel and ensure reliable performance of O-rings, rubber seals, and gaskets.

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