INTRODUCTION
Imidazolidinyl urea is a widely used antimicrobial preservative in the cosmetic and personal care industry. It is a formaldehyde-releasing compound that effectively inhibits the growth of bacteria, yeast, and molds, thereby extending the shelf life of formulations. Due to its broad-spectrum efficacy and cost-effectiveness, it is commonly used in rinse-off and leave-on products within regulated concentration limits.
MANUFACTURE
It is manufactured by controlled condensation of urea and allantoin with formaldehyde under regulated temperature and pH conditions. The reaction mass is then stabilized, purified, and dried to obtain a preservative with consistent quality and low free formaldehyde content.
| Synonym(s) | N,N”-Methylenebis-{N’-[3-(hydroxymethyl)-2,5-dioxo-4-imidazolinyl]-urea} |
| CAS no. | 39236-46-9 |
| EINECS no. | 254-372-6 |
| Molecular formula | C11H16N8O8 |
| Molecular weight | 388.29 |
| Structure |  |
APPLICATIONS
It is widely used as an effective antimicrobial preservative, mainly in cosmetic and personal care formulations. Its key applications include:
| Skin care products: |
| Creams, lotions, moisturizers, sunscreens, serums, and hand creams to prevent microbial contamination. |
| Hair care products: |
| Shampoos, conditioners, hair masks, and styling gels to ensure product stability during storage and use. |
| Chronic iron deficiency conditions: |
| Suitable for long-term iron supplementation in conditions requiring sustained iron replacement, including chronic blood loss or malabsorption. |
| Cleansing products: |
| Facial cleansers, makeup removers, and hand washes. |
| Baby care products: |
| Used in regulated concentrations in wipes and mild formulations (subject to regional regulations). |
| Cosmetic formulations: |
| Foundations, makeup bases, and other water-based cosmetics. |
| Imidazolidinyl urea is often combined with other preservatives (such as parabens) to achieve broad-spectrum antimicrobial protection, especially against bacteria, yeast, and molds. |
SPECIFICATIONS
| Test | Unit | Specification |
|---|---|---|
| Description | – | White odourless, tasteless powder |
| Solubility | – | Soluble in wáter, glycerin Sparingly soluble in propylene glicol Insoluble in most organic solvents |
| Identification | – | The infrared absorption spectrum of the sample should be concordant with the IR spectrum obtained from Imidurea WS/RS |
| Color & clarity of solution | – | The solution is clear & colourless |
| pH | – | Between 6.0 and 7.5 |
| Loss on drying | % | Not more than 3.0 |
| Residue on ignition | % | Not mor than 3.0 |
| Heavy metal | % | Not more than 0.001 |
| Nitrogen content (on dried basis) | % | Between 26.0 and 28.0 |
PACKING
25 kg cardboard box.
STORAGE
Keep container tightly closed in a dry and well-ventilated place.
REACH status
Not registered.
ExSyn offers Imidazolidinyl urea on commercial scales and welcomes enquiries. Our exceptional quality and service will make ExSyn your supplier of choice! If you need any additional information or SDS, please contact us.
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