As part of its "Programme for the prevention of health hazards caused by industrial substances," the Berufsge nossenschaft der chemischen Industrie (BG Chemie, Em ployment Accident Insurance Fund of the Chemical Indus try) began in 1977 to investigate the toxicity of those chemicals which are widely used, have many different ap plications and are suspected of being dangerous to health, in particular of having long-term effects. The in vestigations...