Azodicarbonamide, or azo(bis)formamide, is a chemical compound with the molecular formula C 2 H 4 O 2 N 4.It is a yellow to orange red, odorless, crystalline powder. As a food additive, it is known by the E number E927.zodicarbonamide, or azo(bis)formamide, is a chemical compound with the molecular formula C 2 H 4 O 2 N 4.