student page This is the Qualitative Groundwater Lab. Students will observe videos of the above model where a red dye is used to represent a contaminant. They will make predictions as to which wells ...

that the dye caused cancer in male lab rats. In 1990, the FDA cited the study in banning Red 3 in cosmetics. In 1992, the FDA said it wanted to revoke approval of Red 3 in food and drugs.