What is "prontosil"

Prontosil is an antibacterial drug discovered in 1932 by a research team at the Bayer Laboratories of the IG Farben conglomerate in Germany. It has a relatively broad effect against Gram-positive cocci but not against enterobacteria. The discovery and development of this first sulfonamide drug opened a new era in medicine.

Other names for this substance include sulfamidochrysoïdine, rubiazol, prontosil rubrum, aseptil rojo, streptocide, and sulfamidochrysoïdine hydrochloride.