What is it?:
Diazolidinyl Urea is a white powder used in cosmetics as an antimicrobial preservative. Chemically, it is related to Imidazolidinyl Urea which is used in the same way. It prevents bacterial growth by releasing small amounts of formaldehyde, a toxic and carcinogenic substance used to embalm the dead.
Where You Find it:
You can find it listed on the labels of many cosmetics, skin care products, shampoos and conditioners, as well as bubble baths, household detergents, and baby wipes. Diazolidinyl Urea is also found in the preservative Germaben.
How it’s Made:
In cosmetics products Diazolidinyl Urea is made by the reaction of allantoin (a substance derived from extracts of the comfrey plant) and formaldehyde.
There is a great amount of confusion on this topic because some ingredients, like Urea, are components of urine. In cosmetics, however, synthetic versions are used.
Diazolidinyl Urea is considered safe to be used in cosmetics up to a maximum concentration of 0.5% by the Cosmetic Ingredient Review (CIR) Expert Panel. In Europe, when the concentration of formaldehyde in the finished product exceeds 0.05%, the label has to state “contains formaldehyde”. Diazolidinyl Urea can cause allergies, irritations, and has been linked to immune dysfunction.
The Good Thing:
Rest assured, you will never find Dizolidinyl Urea in Hothouse Botanicals’ products. It is on our “What You Won’t Find in Our Products” list of ingredients we stay away from.