purpurogallin
/ˌpəːpjʊrə(ʊ)ˈɡalɪn/Chemistry
noun
An 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. The dye was so named after the unrelated purpurin by analogy with the preparation of that substance by oxidation of alizarin.
- negatival
- negative
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- negative booster
- negative buoyancy
- negative buoyant
- negative capability
- negative catalysis
- negative catalyst
- negative confession
- negative crystal
- negative definite
- negative energy
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- negative eugenics
- negative evidence
- negative eyepiece
- negative feedback
- negative flag
- negative g
- negative gearing
- negative geotropism