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Neutral
preservative

Imidazolidinyl Urea

Characteristics

INCI
Imidazolidinyl Urea
CAS
39236-46-9
EC
254-372-6
IUPAC
N,N'-Methylenebis[N'-[3-(Hydroxymethyl)-2,5-Dioxoimidazolidin-4-Yl]Urea]
Functions
preservative
EU Restr.
V/27

Для кого подходит

Face Concern
▼ Sensitive Skin ▼ Rosacea ▼ Eczema
Hair Concern
▼ Dandruff ▼ Flaky scalp ▼ Hair Loss ▼ Frizz ▼ Damage ▼ Split Ends ▼ Bleached Hair ▼ Color-Treated ▼ Hydration ▼ Scalp Health ▼ Sensetive Scalp
Application Area
▲ Face ▲ Body ▲ Hair ▲ Scalp ▲ Eyes ▲ Lips

Description

Imidazolidinyl Urea is a preservative used in cosmetics and personal care products to help keep formulas free from unwanted microbial growth. It works by releasing small amounts of formaldehyde over time, which is why it’s effective at protecting products with water in them, such as lotions, shampoos, conditioners, and makeup. It doesn’t provide a direct skin or hair benefit in the way an active ingredient would, but it helps the product stay stable, safe to use, and less likely to spoil.

People who use liquid, creamy, or rinse-off products may encounter it often, especially in formulas that need broad preservation. For most users, it serves a behind-the-scenes role rather than a visible treatment effect. That said, some people prefer to avoid it because formaldehyde-releasing preservatives can be irritating for sensitive skin or for those with a known allergy to formaldehyde or related preservatives. If you’re reactive to fragranced or preservative-heavy products, it may be worth checking labels carefully.

Found in products (1 608 total)

Hair
Face Care
Synonyms
+ Imidazolidinyl Urea Bis(Hydroxymethyl) Imidazolidinyl Vein Bis(Hydroxymethyl)imidazole Alkyl Urea Imidazolidinyl Synthetic Urea Imidazolidinyl Urea (Imidazolidinil Uréia) Imidazolidinyl Urea (Midurea) Imidazolidinyl Urea * Imidazolidinyl Urea◦ Imidazolidinyl Urea⚫ Imidurea