How to quench unreacted sodium azide from reaction mixture? The reaction involved synthesis of azide formation from alkyl bromide in DMF using sodium azide. After the reaction has taken place, how do I quench the unreacted sodium azide from the reaction mixture?
Excess of sodium azide can be quenched using nitrous acid.

$$\ce{2NaNO2 + H2SO4 → 2HNO2 + Na2SO4}$$

$$\ce{2NaN3 + 2HNO2 → 3N2 + 2NO + 2NaOH}$$

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