Imidazolidinyl Urea
Preservative from the formaldehyde-releaser group: gradually releases trace amounts of formaldehyde. A portion of people reacts with contact allergy.
Evidence by route
Topical application
DVery weak or conflicting data.
Patch tests find formaldehyde sensitization in 2–5% of people with contact eczema. Modern formulas increasingly switch to alternative preservatives without free formaldehyde.
Tolerability and safety
Irritation potential
MediumAllergen risk
HighPregnancy
CautionSkin types
Use with caution
Frequently asked questions
Is Imidazolidinyl Urea safe during pregnancy?
Imidazolidinyl Urea should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
What skin types is Imidazolidinyl Urea for?
Use with caution in: sensitive.
Can Imidazolidinyl Urea irritate the skin?
Imidazolidinyl Urea has moderate irritation potential. Sensitive skin may show a transient reaction that usually settles with adaptation.
Can Imidazolidinyl Urea cause an allergic reaction?
Imidazolidinyl Urea has high allergen potential. Perform a patch test on the inner forearm 24 hours before facial application.