Johann Heinrich Ziegler (6 December 1857 in Winterthur – 30 January 1936 in Zurich) was a Swiss dye chemist and natural philosopher.
[2] In 1884, Ziegler developed the yellow azo dye tartrazine in the laboratories of the Bindschedler'sche Fabrik fürchemische Industrie in Basel (CIBA).
The process was first presented in 1887 in Chemische Berichte, the journal of the German Chemical Society.
Ziegler worked for several years as a color chemist in Basel and ran a company in Höngg before he became a private scientist at the turn of the century, searching for a universal formula.
[5] From this theory, he developed what he considered to be a universal world formula, with which he believed he had solved the relationship between light and matter, color and chemical constitution.