Caredermis

Diazolidinyl Urea

Severity 6/10

preservative · also known as germall ii

Is Diazolidinyl Urea safe?

Diazolidinyl Urea carries moderate concerns worth knowing about (cancer concern, allergy risk).

In plain language

A formaldehyde-releasing preservative common in lotions and cleansers, and a recognized cause of preservative contact allergy.

A Caredermis plain-language explanation to help you read the label — not a regulator statement. The sourced facts are the classifications and status shown on this page.

Documented concerns

Concerns marked Editorialare Caredermis' own dermatological review; the rest are drawn from official data — see the cited sources ↓

Cancer concern

6/10

Formaldehyde releaser (IARC Group 1 substance).

Allergy risk

Editorial5/10

Contact allergen; stronger releaser than imidazolidinyl urea.

Official regulatory status

Pulled directly from official regulatory datasets and expert reviews — not our own judgement.

EU-permitted preservative (max 0.5%)CIR: safe as used (with qualifications)

EU SCCS safety opinions

  • · Opinion on The Determination of certain Formaldehyde Releasers in Cosmetic Products
  • · SCIENTIFIC ADVICE ON the threshold for the warning 'contains formaldehyde' in Annex V, preamble point 2 for formaldehyde-releasing substances
Read SCCS opinions ↗

Guidance by skin profile

Caredermis editorial guidance based on the concerns above — checked against the official records on every build, but not itself a regulator statement.

  • Sensitive skinHigh caution
  • Oily & acne-proneNo specific concern
  • Dry skinNo specific concern
  • PregnancyUse with caution
  • Babies & kidsUse with caution
  • Eczema-proneBest avoided

Sources

Each authority below is shown only because our ingested copy of its data lists Diazolidinyl Urea — not because we asserted it. Follow a link to verify the classification or regulation directly.

CIR conclusion from the Cosmetic Ingredient Review (CIR) Quick Reference Table — cir-safety.org (snapshot in data/sources/)(point-in-time snapshot; CIR's live record may have been updated since).

See our methodology for how these map to concern levels. Informational only — not medical advice.

Products in our library containing Diazolidinyl Urea

Related ingredients

Ingredients with a similar role or shared type of concern — useful for comparing what's on your label.

Checking a specific product? Paste its full ingredient list and we'll analyze everything at once.