Synthesis and characterization of a novel class of basic thioindigoid dyestuffs as possible vat dyes and pigments Available to Purchase

Thioindigoid dyestuffs are in an important class of compounds and are used as vat dyes for textile dyeing and printing. This chromophoric system has also found application in the pigment field, especially where suitable substituents in the aromatic nuclei bring about an increase in resistance to solvent bleed and migration. The best example is the reddish‐violet thioindigo bordeaux of light fastness comparable, even in light tints, with the phthalocyanine pigments.