Alizarin purpurin | Article about alizarin purpurin by The Free Dictionary

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purpurin

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purpurin

[′pər·pyə·rən]

(organic chemistry)

C₁₄H₈O₅ A compound crystallizing as long orange needles from dilute alcohol solutions; used in the manufacture of dyes, and as a reagent for the detection of boron. Also known as natural red.