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?
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$\begingroup$ Why do you want to "quench" it? $\endgroup$– SteffXCommented Aug 12, 2016 at 14:16
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$\begingroup$ I happen to read about safety precautions regarding handling, using sodium azide. So I came across few web pages, where they warn you not to dispose it into the drain but try to quench it. So I thought about to get an opinion on this. Anyways I took my reaction mixture, extracted in ethyl acetate/water. And it worked well. $\endgroup$– ChemsohCommented Aug 12, 2016 at 18:59
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1 Answer
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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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