The fading reaction of KIO4 (KBrO3) with DBNCPA in acid medium can be realized only under catalytic action of trace Ru, Rh, Qs, Ir and Pt.

• 可是在高碘酸钾、溴酸钾等氧化剂的存在下，它们却能使二溴硝基偶氮氯膦发生催化褪色反应。