Here's why:

* Nitrite Ion (NO₂⁻): Nitrite ions are unstable in acidic conditions.

* Aluminum (Al³⁺): Aluminum is a metal that forms cations with a +3 charge.

* Reaction: When aluminum ions (Al³⁺) are introduced to nitrite ions (NO₂⁻), a reaction occurs, resulting in the formation of nitrogen oxides (NOx) and other products.

Instead of Aluminum Nitrite, you might be thinking about Aluminum Nitrate (Al(NO₃)₃).

Aluminum Nitrate (Al(NO₃)₃) is a stable compound formed by the reaction of aluminum with nitric acid.