indirubin Chem.
(ɪndɪˈruːbɪn)
[f. indi- + L. rub-er red + -in.]
A substance, isomeric with indigo-blue, obtained by decomposition of indican, crystallizing in long purple metallic-shining needles. Also called indigo-purpurin and indigo-red.
| 1859 [see indican]. 1865–72 Watts Dict. Chem. III. 249 On..exposing the filtrate to the air, a purple-red deposit is formed, consisting of indirubin. 1881 Nature XXIV. 230 The red isomeride of indigo-blue, Indirubin..possesses a splendid red colour, but has little or no tinctorial power. 1889 Morley & Muir Watts' Dict. Chem. II. 759/2 When fresh indican solution is mixed with strong acid and boiled, only indigo and indiglucin are obtained, but if the indican solution is previously boiled for a short time indirubin is also formed. |