Dinitrogen oxide can potentially refer to any of at least four compounds:

• Dinitrogen monoxide, more commonly known as nitrous oxide, N₂O;
• Dinitrogen trioxide, N₂O₃;
• Dinitrogen tetroxide, N₂O₄, an unstable dimer of nitric oxide;
• Dinitrogen pentoxide, N₂O₅.

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