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Salix nigra - Black willow

188 bytes removed, 6 years ago
→‎Chemical Composition
==Chemical Composition==
Analysis has shown a brownWhite-willow bark, resinous, acrid substance, insoluble in potassium hydroxide according to Pelletier and probably containing pelletoninCaventou, two oils soluble in potassium hydroxide - one dark brown and acridconsists of bitter, the other yellow - tannincoloring matter, gumgreen fatty matter, potassium sulphate and carbonatetannic acid, potassium chloride, calcium phosphate and carbonate, silica, alumina, ligninresin, etc. An alkaloidThe chief constituent, Pyrethrinehowever, yielding pyrethric acidas with all the willows, is stated to be the active principle.glucosid salicin (see Salicinum)<ref name="chemical composition"/>
==Common names==
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