Ingredient

diazolidinyl urea

High risk

FunctionPreservative

What it is — Diazolidinyl Urea (INCI: Diazolidinyl Urea) is a synthetic preservative and a known formaldehyde releaser.

What it does — It is used at low levels to protect water-containing formulas from microbial growth.

Typical use — It appears at low, regulated levels in some rinse-off and leave-on products, though many brands now prefer alternative preservatives.

Who it suits / good to know — As a formaldehyde-releasing preservative it is associated with contact allergy and irritation, so those with sensitive skin or a formaldehyde allergy may prefer to avoid it.

Safety — DHALIORA grades it high risk: a formaldehyde-releasing preservative associated with contact allergy and irritation. This reflects the ingredient in general and is not medical advice; patch-test before wider use and discontinue if irritation occurs.

Why we grade it High: High risk - formaldehyde-releasing preservative associated with contact allergy and irritation.
Cross-reference

Found in these DHALIORA products

Found in 0 DHALIORA products

Not currently in any DHALIORA product.

How grades are set — Risk reflects our own reading of publicly available safety data, an EWG-style reading shown at the worst-case grade we've assigned this ingredient across products. It isn't a third party's proprietary score, and it isn't medical advice. Always read the packaging and patch-test where indicated.
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