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Marsdenia :: Marsdenia (n.) A genus of plants of the Milkweed family, mostly woody climbers with fragrant flowers, several species of which furnish valuable fiber, and one species (Marsdenia tinctoria) affords indigo..

Urrhodin :: Urrhodin (n.) Indigo red, a product of the decomposition, or oxidation, of indican. It is sometimes found in the sediment of pathological urines. It is soluble in ether or alcohol, giving the solution a beautiful red color. Also called indigrubin..

Indigometer :: Indigometer (n.) An instrument for ascertaining the strength of an indigo solution, as in volumetric analysis..

Indigo :: Indigo (n.) A blue dyestuff obtained from several plants belonging to very different genera and orders; as, the woad, Isatis tinctoria, Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. It is a dark blue earthy substance, tasteless and odorless, with a copper-violet luster when rubbed. Indigo does not exist in the plants as such, but is obtained by decomposition of the glycoside indican..

Pyrosulphuric :: Pyrosulphuric (a.) Pertaining to, or designating, an acid called also disulphuric acid) obtained by distillation of certain sulphates, as a colorless, thick, oily liquid, H2S2O7 resembling sulphuric acid. It is used in the solution of indigo, in the manufacture of alizarin, and in dehydration..

Indigotin :: Indigotin (n.) See Indigo blue, under Indigo..

Diisatogen :: Diisatogen (n.) A red crystalline nitrogenous substance or artificial production, which by reduction passes directly to indigo..

Indican :: Indican (n.) A glucoside obtained from woad (indigo plant) and other plants, as a yellow or light brown sirup. It has a nauseous bitter taste, a decomposes or drying. By the action of acids, ferments, etc., it breaks down into sugar and indigo. It is the source of natural indigo..

Indophenol :: Indophenol (n.) Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated..

Woad :: Woad (n.) A blue dyestuff, or coloring matter, consisting of the powdered and fermented leaves of the Isatis tinctoria. It is now superseded by indigo, but is somewhat used with indigo as a ferment in dyeing..

Indicolite :: Indicolite (n.) A variety of tourmaline of an indigo-blue color.

Indigogen :: Indigogen (n.) See Indigo white, under Indigo..

Indirubin :: Indirubin (n.) A substance isomeric with, and resembling, indigo blue, and accompanying it as a side product, in its artificial production..

Indican :: Indican (n.) An indigo-forming substance, found in urine, and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin). Chemically, it is indoxyl sulphate of potash, C8H6NSO4K, and is derived from the indol formed in the alimentary canal. Called also uroxanthin..

Isatogen :: Isatogen (n.) A complex nitrogenous radical, C8H4NO2, regarded as the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue..

Chemistry :: Chemistry (n.) An application of chemical theory and method to the consideration of some particular subject; as, the chemistry of iron; the chemistry of indigo..

Indolin :: Indolin (n.) A dark resinous substance, polymeric with indol, and obtained by the reduction of indigo white..

Anil :: Anil (n.) A West Indian plant (Indigofera anil), one of the original sources of indigo; also, the indigo dye..

Indin :: Indin (n.) A dark red crystalline substance, isomeric with and resembling indigo blue, and obtained from isatide and dioxindol..

Uroglaucin :: Uroglaucin (n.) A body identical with indigo blue, occasionally found in the urine in degeneration of the kidneys. It is readily formed by oxidation or decomposition of indican..

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