Alexander Clavel

Alexander Clavel (17 December 1805 – 22 February 1873), also recorded as Alexander Clavel-Oswald and Alexander Clavel-Linder in 19th-century Basel sources, was a French-born Swiss textile industrialist and silk dyer who, in 1859, began producing the synthetic dye fuchsine in Basel. In 1873 he sold his works to Bindschedler & Busch, the predecessor of the Gesellschaft für Chemische Industrie in Basel [Society for the Chemical Industry in Basel] (Ciba). His early adoption of synthetic dyes and his move to the Basel-Klybeck district were pivotal in Basel's emergence as a European center of the dye and chemical industries.

Portrait of Alexander Clavel-Merian (1847–1910), son of the founder (Basel University Library).

Early life and family Clavel was born in Lyon in 1805 and trained as a silk dyer.

Career He settled in Basel in 1838 and married Henriette Linder, widow of silk dyer Karl Theodor Oswald, taking over the Oswald dye works at the Bläsihof in Kleinbasel. Fuchsine belongs to the triarylmethane class; in 19th-century trade literature it was often called aniline red, but that term was used loosely for related red aniline dyes and is not chemically precise. Modern historical reviews distinguish fuchsine/magenta from looser uses of aniline red.

Complaints about fumes from arsenic-based processes led Basel authorities to restrict aniline-red production; in 1864 Clavel moved the works to the Klybeckstrasse on the Rhine, creating a "Laboratorium für Fabrikation von Anilin- und anderen Farben" [Laboratory for the production of aniline and other dyes].

In 1873, weeks before his death, his dye plant was sold to the chemist Robert Bindschedler and the businessman Albert Busch (Bindschedler & Busch), whose partnership was reorganized in 1884 as the Gesellschaft für Chemische Industrie in Basel (Ciba).

Personal life Clavel became a naturalized citizen of Basel in 1849.

Death and legacy Clavel died in Basel on 22 February 1873.