Very Disliked
Imidazolidinyl Urea
Preservative
Preservatives are used to prevent the growth of bacteria and mold in products. They are typically used in cosmetic products to help extend the shelf life of the product.
Can worsen Eczema
Some ingredients are known to be potential triggers for eczema. However, triggers vary greatly between individuals. Keep a diary to identify your personal triggers and work with a dermatologist to develop a gentle, effective routine.
May cause Irritation
Some ingredients have higher irritation potential, particularly for sensitive skin. Common reactions include redness, burning, or itching. If you have sensitive skin, patch test first and introduce these ingredients slowly into your routine.
Explained
Imidazolidinyl Urea is a synthetic antimicrobial preservative. It works by slowly releasing small amounts of formaldehyde to keep bacteria, yeast, and mold from growing.
Just so you know, the formaldehyde released at typical use concentrations (up to 0.6% in the EU and typically 0.1-0.3% in the US) are tiny. The CIR Expert Panel has reaffirmed its safety as a cosmetic ingredient at current use concentrations in 2023. It's also not mutagenic in cell studies.
However, it is a known contact sensitizer with about a 1-2% contact allergy rate.
Other formaldehyde releasers include Diazolidinyl Urea or DMDM Hydantoin.
See all 368 products with Imidazolidinyl Urea
Users who like it
4%
Users who avoid it
96%
What it does
Preservative
Tending to preserve or capable of preserving.
Prevalence
Less common
Percentage of products that contain it
0.3%
Top categories
Moisturizers
Cleansers
Treatments
Position
Predominant list placement
Bottom 50%
References
CosIng Data
CosIng ID
34567
INCI Name
IMIDAZOLIDINYL UREA
INN Name
imidurea
EC #
 254-372-6
All Functions
Preservative
