tetrazotize

\\ ̷ ̷ˈ ̷ ̷əˌtīz\ transitive verb (-ed/-ing/-s)

Etymology: tetra- + -azotize (as in diazotize)

: to diazotize doubly : convert (as an aromatic diamine) into a disazo compound

benzidine is tetrazotized for making a benzidine disazo dye