March 25, 2006 Top Ten Causes Of Skin Allergys March 25, 2006/ Medical Spa MD Nickel (nickel sulfate hexahydrate). A metal frequently encountered in jewelry and clasps or buttons on clothing. Gold (gold sodium thiosulfate). A precious metal often found in jewelry. Balsam of Peru (myroxylon pereirae). A fragrance used in perfumes and skin lotions, derived from tree resin. Thimerosal. A mercury compound used in local antiseptics and in as a preservative in some vaccines. Neomycin sulfate. A topical antibiotic common in first aid creams and ointments, also found occasionally in cosmetics, deodorant, soap, and pet food Fragrance mix. A group of the eight most common fragrance allergens found in foods, cosmetic products, insecticides, antiseptics, soaps, perfumes, and dental products. Formaldehyde. A preservative with multiple uses. It's found in paper products, paints, medications, household cleaners, cosmetic products, and fabric finishes. Cobalt chloride. Metal found in medical products; hair dye; antiperspirant; objects plated in metal such as snaps, buttons or tools; and in cobalt blue pigment. Bacitracin. A topical antibiotic. Quaternium 15. A preservative found in cosmetic products such as self-tanners, shampoo, nail polish, and sunscreen or in industrial products such as polishes, paints, and waxes.