Madder Root contains rubian, rubiadin, ruberythric acid, purpurin, tannin, sugar & especially alizarin. Although not as a general rule employed medicinally, It is generally used as a dye. The most interesting of the colouring substances it contains is the alizarin, & this is now termed dihydroscyanthraquinone. This occurs as orange-red crystals, almost insoluble in water, but readily soluble in alcohol, ether, the fixed oils & alkaline solutions. The alcoholic & aqueous solutions are rose-coloured, the ethereal, golden-yellow; the alkaline, violet & blue when concentrated, but violet red when sufficiently diluted. A beautiful rose-colour is produced by precipitating a mixture of the solutions of alizarin & alum. When taken into the stomach it imparts a red colour to the milk & urine, & to the bones of animals without affecting any other tissue. The effect is observed most quickly in the bones of young animals & in those nearest to the heart. Etsy operates under US law & is subject to FDA rules concerning information about the benefits & attributes of plant & herbal material which means such information cannot legally be listed here but for more details of this & other herbal material please visit our website at www.luminescents.net Where this a wealth of information available Madder Cut & Dried Root - Rubia Tinctorium 100 Grams Natural Dye
