Yes, I meant persulfate, it was a typo. There have been reported cases of allergic reations to denture cleaners (which are basically MPS) which the FDA has issued alerts on, and also people that have problems in bromine santized spas where MPS is the primary oxidizer. Also, ammonium persulfate used in hair bleach can cause allergic reactions including asthma so it seems the persulfates as a group are allergic sensitizers (have had actual experience with this since I am a licensed barber and cosmetologist for going on 40 years now and worked most of that professional career as a colorist and instructor, and although I have not worked in a salon or barber/beauty school for about 15 years now I keep both licenses current and active and take contiuining education courses in both fields to stay current.)

It would seem logical that there would be cross sensitization among the various persulfates since that does occur with other allergens but I do not know for sure.