Ingredient
Diazolidinyl Urea
A formaldehyde-releasing preservative, often paired with a paraben or with phenoxyethanol.
What it does
Preservative
Keeps the product free of microbial growth in use.
What we tell people
- Contains a formaldehyde-releasing preservative
This product contains a preservative that works by slowly releasing formaldehyde. EU rules require products above a threshold to carry a specific label warning.
Why: This group is genuinely subject to a labelling obligation, so it is marked regulatory. The ingredient is not formaldehyde itself, and the flag says so.
Reference
- In our catalogue
- 2 products
Ingredient reference data © European Union, 1995–2026, reused under CC-BY 4.0. Plain explanations are BeautySignal's own. This is information, not medical advice. How we source this.