http://www.time.com/time/magazine/articl... caused cancer
It was determined to be a carcinogenic (cancer-causing substance).
"Perhaps the most famous case is that of the heavy use of suspected cancer-causing Red Dye #2. "
http://www.everything2.com/title/Red+Dye...
People come in contact with thousands of chemicals every day, but only about 200 have been tested for safety, while cancer has become an epidemic.