Preservative ingredient
Diazolidinyl Urea
A formaldehyde-releasing synthetic preservative (also marketed as Germall II) used in water-based cosmetics for broad-spectrum antimicrobial protection.
Also known as: germall ii
preservativeantimicrobial
Benefits
- ✓Broad-spectrum antimicrobial preservative effective against bacteria, yeast, and fungi
- ✓EU-approved for use up to 0.5% (Annex V, Entry 55)
Watch for
- ⚠Formaldehyde-releasing preservative; may cause sensitization in formaldehyde-allergic individuals
- ⚠Higher sensitizing potential than imidazolidinyl urea (patch-test allergy rate around 3.5%)
- ⚠Increasing regulatory scrutiny and phase-out in 'clean beauty' formulations
In depth
What it does
A formaldehyde-releasing synthetic preservative (also marketed as Germall II) used in water-based cosmetics for broad-spectrum antimicrobial protection. As an preservative ingredient, it is particularly valued for broad-spectrum antimicrobial preservative effective against bacteria, yeast, and fungi and eu-approved for use up to 0.5% (annex v, entry 55).
