IG Farben consisted of the following major companies and several smaller ones.
* AGFA (Aktien-Gesellschaft für Anilin-Fabrikation), Berlin
* Cassella, Frankfurt
* BASF (Badische Anilin und Soda Fabrik), Ludwigshafen
* Bayer, Leverkusen
* Farbwerke Hoechst (now Sanofi-Aventis), Höchst
* Chemische Werke Hüls, Marl (founded in 1938)
* Chemische Fabrik Kalle, Biebrich
An examination of internal Bayer company documents by The New York Times reveals that the company was engaged in unsavory, probably criminal marketing practices. The documents reveal that Bayer continued to sell contaminated blood plasma causing thousands of hemophiliac patients to be infected with AIDS. The company continued to sell the contaminated blood in Asia for over a year when it had already introduced a safer, heated blood plasma version in the US and Europe in February 1984.
The documents examined by the Times provide evidence of unrestrained corrupt practices by a pharmaceutical industry giant. According to The Times, records suggest that the reason for continuing to sell an AIDS infected blood product, was to get rid of inventory and "the company hoped to preserve the profit margin from 'several large fixed-price contracts.'