Another had a prior reaction to titanium dioxide and titanium oxalate but did not react to ... 3 and ethylhexyl dimethyl para-aminobenzoic acid (PABA). None reacted to the Tinosorbs or Anthelios ...
The vast majority of CICD reactions, however, are caused by one of seven basic irritant groups: calcium oxalate, protoanemonin, isothiocyanates, diterpene esters, bromelain, and alkaloids.