Quaternium-15 is the most sensitizing of these FRPs and is found in blush, mascara, lotion and shampoo.
DMDM Hydantoin is found in lotion, sunscreen and make-up remover and is one of the least sensitizing of the FRPs.
Imidazolidinyl urea, diazolidinyl urea, and polyoxymethylene urea, are found in shampoo, conditioner, blush, eye shadow, and lotion and are all known human allergens. Imidazolidinyl urea is one of the most common antimicrobial agents used in personal care products and is often combined with parabens to provide a broad spectrum preservative system.Diazolidinyl urea releases the most formaldehyde of any FRP.
Sodium hydroxymethylglycinate is found in shampoo, moisturizer, conditioner, and lotion. Animal studies have shown that sodium hydroxymethylglycinate has the potential for sensitization and dermatitis.
Bromopol is found in nail polish, makeup remover, moisturizer and body wash. Bromopol is considered safe in concentrations less than 0.1%, but cannot be found in formulations with the FRP amine. Mixing bromopol and amines produce nitrosamines (Link to same chemical in nitrosamines) which have been found to penetrate the skin and cause cancer.
Glyoxal is found in conditioner, lotion, nail polish and nail treatment. CIR Expert Panel has declared that glyoxal is a skin allergen.
Often formaldehyde is released from the preservatives included in personal care products.
Formaldehyde is a sour, strong-smelling gas. Remember what the Ikea stores used to smell like? That sour smell that would hit you in the face when the doors opened? That’s formaldehyde.
Formaldehyde is also used in glue for wood products like plywood and MDF.
Formaldehyde has been linked to cancer and is absorbed through the skin as well as inhaled. Reduce your formaldehyde exposure whenever possible.