Hello atomicbison, and welcome to Basenotes.
A starting point may be to check the stated ingredients on the boxes. There may be some chemical ingredient common to all of them.
Generally all one can find out beyond that is the "notes" of a fragrance, but that will not necessarily help you since the notes usually represent accords-- combinations of molecules that produce a particular scent impression (say, the smell of a peach.)
Are you getting the rash after the sprayed skin is exposed to the sun? Some ingredients (like bergamot) are photosensitizing.