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The reaction of ozone (~5% in oxygen) with sodium azide (0.02-0.2 M in water) at pH 12 and 0-4 o C is shown to yield concentrated, stable peroxynitrite solutions of up to 80 mM. The product of this reaction is identified based on a broad absorption spectrum with a maximum around 302 nm and by its first-order rate of decomposition (k = 0.40 +/- 0.01 s -1 at pH 7.05 and 25 ...
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