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noun
ChemistryAn orange-red crystalline dye, originally prepared by mild oxidation of pyrogallol and later found to occur in some oak galls.
Purpurogallin is a tetrahydric phenol with fused tropolone and trihydroxybenzene rings; C₁₁H₈O₅.
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From French purpurogalline from purpur- (in purpurine) + -ogall- + -ine.
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