Diazolidinyl Urea
Avoid
Official INCI name
A formaldehyde-releasing preservative and a known cause of contact allergy.
What it does
Preservative. Stops bacteria, yeast and mould growing in the product.
Worth knowing
A preservative that slowly releases formaldehyde, a known sensitizer and carcinogen.
Can cause contact allergy that, once developed, returns on every exposure.
“Diazolidinyl Urea” is its name in the EU glossary of common ingredient names (no. 8436), the names labels in the EU must use. © European Union, EUR-Lex.