Question

Alpha naphthol reaction with ferric chloride color

Answer 1

Theferric chloridetestis used to determinethe presence ofphenolsin a given sample or compound (for instancenatural phenolsin a plant extract).Enols,hydroxamic acids, oximes, and sulfinic acids give positive results as well.[1]Thebromine testis usefulto confirm the result, although modern spectroscopic techniques (e.g.NMRandIR spectroscopy) are far superior in determining the identity of the unknown. The quantity of total phenols may be spectroscopically determined by theFolin-Ciocalteau assay.

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