Artificial dye-stuffs; their nature, manufacture, and uses (1917)
Ramsey, Albert R. J, Weston, H. Claude (Hubert Claude) · London, Routledge; New York, Dutton · leaf 116
j) is displaced by a group containing sulphur and asecond carboxyl group, the resulting product beingknown as phenylthioglycoUic-o-carboxylic acid, havingthe formula— CH HC /\, C—SCH,. COOH HC I J C—COOHCH When this substance is heated \\ith caustic soda, oracetic anhydride, a rearrangement of the… … Heat is again applied, and carbon dioxide is given off,leaving thioindoxyl— HCHC CH, ^CO^ condensation and oxidation of which gives Thio-indigo, or Thioindigo Red. An alternative method consists in treating anthranilicacid with sulphur containing bodies to form thio-salicylic acid. This is usually…
Dyes and dyeing
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