Noun
azodicarbonamide (countable and uncountable, plural azodicarbonamides)
(chemistry) An organic chemical, a yellow to orange red, odorless, crystalline powder, used in food industry as a food additive, flour bleaching agent and improving agent, and in foaming plastics.
Subway removed azodicarbonamide from its bread. citation Before Vani Hari's petition, Subway had used azodicarbonamide as a bread conditioner, to whiten the dough and allow sandwich bread to bake more quickly. Source: Internet