SCA endorses products with the Allergy Certified logo, that do not contain Toluenesulfonamide, formaldehyde resin. “HUMAN EXPOSURE STUDIES/ 8 cases of contact dermatitis from toluenesulfonamide formaldehyde resin in a nail hardener are presented. Most patients had used nail lacquers containing this resin for many years without trouble, but became sensitized to the resin shortly after the introduction of this particular nail hardener.” - Toxicology Data Network.
CAS No: 25035-71-6
HOW IS IT USED?
Toluenesulfonamide formaldehyde resin: is a nail hardener or lacquer, found in enamel products. "A synthetic resin" - Cosmetic.info
"Function(s): Film Former; Plasticizer; Suspending Agent - Nonsurfactant; FILM FORMING; PLASTICISER" - EWG "Strong evidence human toxicant or allergen"
“Formaldehyde is a naturally occurring substance made of carbon, hydrogen and oxygen. Humans produce about 1.5 ounces of formaldehyde a day as a normal part of our metabolism. Inhaled formaldehyde is rapidly metabolized and ultimately converted to carbon dioxide and exhaled. Formaldehyde does not accumulate in the body.” - download the fact sheet by AmericanChemistry.com
RESEARCH - WHAT DO EXPERTS SAY?
International restrictions apply 0.1% to 5%
"Other frequent causes of cosmetic-related contact allergic reactions were toluenesulfonamide formaldehyde resin in nail hardener and/or nail lacquer (15 patients [12.6%])." - Scinapse.io/papers
NICNAS Australia: "Polymers containing formaldehyde monomers: Human health tier II assessment: used in various coatings, adhesives and automotive." And, "reported cosmetic uses including as film forming agents, in nail conditioning, in skin conditioning, in hair conditioning, and as antimicrobial agents." And, "reported domestic uses including as antimicrobial preservatives in household cleaning products (dishwashing and laundry liquids, surface cleaners and polishes), in specialty paints, adhesives, sealants, lubricants, and wall insulation." And, "reported commercial uses as binders, defoaming agents, epoxy hardeners, and in the production of resins for the manufacture of pressed wood products, textile treatments, paper treating and coating." And, "non-industrial uses as antiseptics, fungicides, bactericides, and fungicides."
TGA Poisons Standard Schedule 6 -
"human therapeutic use, oral hygiene preparations, nail hardener cosmetic preparations containing 5 per cent or more of free formaldehyde; in nail hardener cosmetic preparations containing 0.2 per cent or less of free formaldehyde when labelled with the statement: PROTECT CUTICLES WITH GREASE OR OIL. in aerosol sprays for cosmetic use containing 0.005 per cent or more of free formaldehyde; nail hardening products at a maximum concentration of 5 % in ready for use preparation; if the concentration exceeds 0.05 %, the label must indicate 'Contains formaldehyde';"
RESOURCES & RECOMMENDED ARTICLES:
Nail Cosmetics Allergy "In addition to causing allergic and irritant contact dermatitis reactions, some ingredients of nail cosmetics may also cause secondary nail infections such as paronychia, onycholysis, onychia and severe and prolonged paraesthesia. These conditions can be extremely painful, long-lasting and debilitating."