The substance they used was the common food dye known as tartrazine, which also goes by the names of Yellow 5 and E102 when it is used in food (like Doritos), cosmetics, and drugs. By rubbing the ...

Tartrazine, or E102, is a widely used orange dye prevalent in the food, pharmaceutical, and cosmetic industries. Those who need to be particularly wary of its consumption include allergy sufferers ...