[The allergenic nature of p-tert-butylphenolformaldehyde resin].

Until now allergic contact dermatitis to polychloroprene glues was thought to be caused by uncondensed p-tert.-butylphenol (monomer) or by the p-tert. burylphenol formaldehyde resin molecule (polycondensate) as allergens. This opinion could not be verified. We found the following two contact allergens: 2-hydroxy-5-tert.-butylbenzyl alcohol and a four nuclear-condensate from four p-tert-butylphenol molecules linear combined by methylene bridges.