4,4-Bis(4-aminophenylsulfonyl)-azobenzene-d16 is the isotope labelled analog of 4,4-Bis(4-aminophenylsulfonyl)-azobenzene. 4,4-Bis(4-aminophenylsulfonyl)-azobenzene is synthesized from dapsone (D193250), an antibacterial used in the treatment of dermatitis herpetiformis.