Thioindigoid Dye

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.