IMIDAZOLIDINYL UREA
Is IMIDAZOLIDINYL UREA safe for seborrheic dermatitis?
Imidazolidinyl Urea is context-dependent for seborrheic dermatitis. It protects a formula from microbial contamination, but it can be a contact-allergy problem for some people and does not treat seb derm.
Clinical reviews and patch-test data recognise Imidazolidinyl Urea as a formaldehyde-releasing preservative relevant to allergic contact dermatitis. The patch-test population was already suspected of allergy, so those results do not mean most users will react. It does not present a fatty Malassezia concern; the practical issue is whether a leave-on product repeatedly causes itching, redness or an eczema-like rash.
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What is it?
A quick identity check, separate from the seb derm guidance above.
01 / 05- Material type
- Antimicrobial preservative
- Ingredient family
- Formaldehyde-releasing preservative
- Cosmetic function
- Preservative
What is IMIDAZOLIDINYL UREA used for in skincare?
Imidazolidinyl Urea is a preservative that slowly releases small amounts of formaldehyde to control bacteria and help keep water-based products stable during use. It is often combined with other preservatives to broaden protection. It may appear with parabens, phenoxyethanol, humectants and emulsifiers in creams, lotions, shampoos and makeup.