Thioindigoid Dye
(or thioindigoid), any of several vat dyes of the indigoid group that contain sulfur. The parent compound of the thioindigoid dyes is thioindigo (2,2-bis-thionaphtheneindigo), the sulfur analogue of indigo:
Thioindigoid dyes are used to dye cotton, wool, flax, rayon, silk, and fur; they produce orange, red, violet, brown, and black. Various shades may be obtained by using different thioindigoid derivatives, particularly asymmetric derivatives such as 2-thionaphthene–2-indolindigo.
Thioindigoid dyes form fast colors. They are obtained from aromatic amines and certain other aromatic compounds by a complicated multistage process.
REFERENCE
Stepanov, B. I. Vvedenie v khimiiu i tekhnologiiu organicheskikh krasitelei [textbook]. Moscow, 1971.Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
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