indican

A potassium salt, C₈H₆NO₄SK, found in urine and formed by the conversion of tryptophan to indole by intestinal bacteria.

A glucoside, C₁₄H₁₇NO₆, found in the indigo plant and used as a source for indigo dye.

The alkali salt of indoxyl-sulphuric acid, C₈H₆NSO₄H. It occurs in urine. See the following phrase.

The natural glucoside (C₂₆H₃₁NO₁₇) by the decomposition of which indigo blue is produced from the various species of indigo-producing plants.

A glucoside (C14H17NO6) obtained from woad (indigo plant, Isatis Tinctoria) and other plants (see indigo), as a yellow or light brown sirup. When purified it is obtained as spear-shaped crystals. It has a nauseous bitter taste. By the action of acids, enzymes, etc., it breaks down into sugar and indigo. It is the source of natural indigo. Chemically it is the 3-glucoside of indole, H-indol-3-yl-β-D-glucopyranoside.

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.

A glucoside obtained from woad and other plants, the source of natural indigo.

An indigo-forming substance found in urine and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin); an indoxyl sulphate of potash.