Quercitron
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Quercitron

the cut up bark (or extract of the bark) of several North American oaks (mainly Quercus velutina tinctoria), used to dye silk and wool yellow. Quercitron contains the glycoside quercitrin, which when boiled with acids breaks down into the sugar rhamnose and the dyestuff quercetin (tetraoxy-flavonol: C₁₅H₁₀O₇). Quercetin is in the form of lemon-yellow needles, which are poorly soluble in water.

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Quercitron (redirected from Quercitron Bark)

Quercitron
(redirected from Quercitron Bark)