Imidazolidinyl Urea
Decode Label flags Imidazolidinyl Urea as a moderate concern in cosmetics and personal care (carcinogen). It was not found in any of the 893 published products we have analysed.
The concern
Formaldehyde-releasing preservative — allergy and carcinogen risk
Imidazolidinyl urea releases formaldehyde and is one of the most common causes of cosmetic-related contact dermatitis. Should be avoided by people with formaldehyde sensitivity, atopic eczema, or occupational formaldehyde exposure.
Most relevant to
Not found in this catalogue
0 of 893 published products Decode Label has analysed list Imidazolidinyl Urea or any of its label synonyms. That describes this catalogue, not the Indian market as a whole. If a product we score lists it, it will appear here and its score will reflect it.
Regulatory position
From the published regulation itself. Each row links to its source.
| Authority | Status | Reference | Scope / limit | Source |
|---|---|---|---|---|
| EU-CosIng | Permitted | Annex V 27 | — max 0.6% | View → |
Identity
- Canonical name
- N,N''-Methylenebis[N'-[3-(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]urea]
- INCI name
- IMIDAZOLIDINYL UREA
- CAS number
- 39236-46-9
- EC number
- 254-372-6
Also appears on labels as
Questions
Is Imidazolidinyl Urea safe?
The concern is cited to American Contact Dermatitis Society; SCCS. Why it is flagged: Formaldehyde-releasing preservative — allergy and carcinogen risk. Decode Label treats it as a moderate concern in cosmetics and personal care. It was not found in any of the 893 published products we have analysed.
How common is Imidazolidinyl Urea in Indian packaged products?
Decode Label has not found Imidazolidinyl Urea in any of the 893 published products analysed so far. That describes this catalogue, not the Indian market as a whole.
Is Imidazolidinyl Urea restricted or banned anywhere?
Under the EU Cosmetics Regulation (EC) No 1223/2009 (CosIng), Imidazolidinyl Urea has 1 permitted entry. Each is shown with its annex reference and a link to the source in the Regulatory position table.
Who should be most careful with Imidazolidinyl Urea?
Anyone using this regularly; People prone to allergies.
Related ingredients
Other entries in the register with the same kind of concern.
Method and limits
- Prevalence counts published products whose decoded ingredient list matches this substance or one of its label synonyms, using the same matching the score itself uses. It describes our catalogue of 893 products, not the Indian market as a whole.
- Presence is not dose. An ingredient list gives order, not quantity, unless the pack declares a percentage. Nothing here estimates how much of this substance any product contains.
- A classification is not a verdict on a product. An agency classifies a substance under defined conditions of exposure; whether that matters in a given food or cosmetic depends on route, concentration and use.
- Last updated. This register entry was last changed on 28 September 2026.
- Corrections. Every figure here is reproducible from the sources named. If something is wrong, tell us and we will correct it and say what changed.