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| Catalog Number | CI-HS-0003 |
| Product Name | Imidazolidinyl Urea |
| CAS | 39236-46-9 |
| Structure |  |
| Description | Solid broad-spectrum preservative useful to preserve all kinds of personal care products. Inhibits growth of bacteria, mold, and yeast. |
| Molecular Weight | 388.29 g/mol |
| Molecular Formula | C13H16N8O8 |
| Solubility | Water-soluble |
| Appearance | White, fine, odorless powder |
| Application | All kinds of skin and hair care products |
| Storage | Store light-protected at a cool and dry place |
| HS Code | 2905310000 |
| INCI | Imidazolidinyl urea |
| Uses | Recommended use level 0.1-1%. For external use only. |
Imidazolidinyl Urea is a widely used cosmetic preservative known for its efficacy against Gram-negative bacteria, including Pseudomonas aeruginosa, as well as Gram-positive bacteria. While it does not exhibit activity against fungi, it works synergistically with parabens to enhance preservation. Characterized as a white, nearly odorless granular powder, Imidazolidinyl Urea is completely soluble in water but insoluble in oils, with limited solubility in propylene glycol and glycerin. It should be noted that it decomposes when exposed to a pH greater than 9 for an extended period. Compatibility with a broad range of cosmetic ingredients, such as surfactants and proteins, contributes to its versatility, although it is incompatible with dibenzoil methane derivatives, which are used as UV-A filters.
What is Imidazolidinyl Urea, and what is its primary function in cosmetics?
Imidazolidinyl Urea is a cosmetic preservative used primarily to protect products against bacterial contamination. It is particularly effective against Gram-negative bacteria, including Pseudomonas aeruginosa, as well as Gram-positive bacteria. However, it has no activity against fungi.
In what form is Imidazolidinyl Urea typically available, and how does it integrate with cosmetic formulations?
Imidazolidinyl Urea is available as a white granular powder that is almost odorless. It is completely soluble in water, which makes it easy to incorporate into water-based cosmetic formulations. However, it is insoluble in oils and has limited solubility in propylene glycol and glycerin, which should be considered during formulation.
Are there any compatibility concerns with Imidazolidinyl Urea when used in cosmetic products?
Imidazolidinyl Urea is compatible with most cosmetic ingredients, such as surfactants, proteins, and various special ingredients. However, it is not compatible with dibenzoil methane derivatives, which are used as UV-A filters, and this may limit its use in sun care products.
How does pH affect the stability and efficacy of Imidazolidinyl Urea?
Imidazolidinyl Urea remains stable and effective under normal pH conditions typical in cosmetic products. However, it breaks down with extended exposure to a pH greater than 9. Therefore, it is essential to consider the pH of the product during formulation to ensure the preservative's effectiveness.
How does Imidazolidinyl Urea work in conjunction with other preservatives like parabens?
Imidazolidinyl Urea is synergistic with parabens. This means that when used together, the combination can enhance the overall preservative efficacy, providing broader protection against microbial contamination. This synergy is especially beneficial in complex cosmetic formulations requiring robust preservation systems.
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