Diazolidinyl Urea is a specialty cosmetic ingredient widely used as a preservative in personal-care and cosmetic formulations. It is identified by the INCI name DIAZOLIDINYL UREA, CAS Number 78491-02-8, and EC Number 278-928-2. It belongs to the group of formaldehyde-releasing preservatives and is designed to help protect susceptible water-containing formulations from microbial contamination. The European Commission lists Diazolidinyl Urea as a permitted cosmetic preservative with a maximum concentration of 0.5% in the ready-to-use cosmetic preparation.
Diazolidinyl Urea is particularly relevant to manufacturers of creams, lotions, shampoos and other personal-care formulations where microbiological protection is an important part of product stability. Its technical properties, purity, formaldehyde-release characteristics, pH and compatibility should be considered when selecting it as a cosmetic preservative ingredient.
Diazolidinyl Urea is chemically identified as 1-[1,3-bis(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]-1,3-bis(hydroxymethyl)urea. Its molecular formula is C8H14N4O7 and its molecular weight is approximately 278.22 g/mol. A current Thermo Fisher specification describes the material as a white powder and gives a loss-on-drying limit of NMT 3%.
Diazolidinyl Urea is soluble in water, while older European technical documentation describes it as insoluble in most organic solvents. Its chemical behaviour in aqueous systems is important because the substance can gradually release formaldehyde.
For B2B procurement, buyers should evaluate the CAS number, INCI identity, assay method, nitrogen content, loss on drying, pH, free formaldehyde, appearance and batch-specific Certificate of Analysis.
Diazolidinyl Urea functions primarily as a cosmetic preservative ingredient. Its preservation mechanism is associated with the gradual release of formaldehyde, which can help control microorganisms in appropriately formulated cosmetic products. European technical documentation specifically identifies Diazolidinyl Urea as a formaldehyde-releasing preservative.
The preservative must be evaluated as part of the complete formulation. The effectiveness of a preservative system depends on factors including formulation composition, water availability, pH, packaging, processing hygiene and interactions with other ingredients.
Because Diazolidinyl Urea releases formaldehyde, manufacturers should also consider applicable requirements concerning free formaldehyde in the finished cosmetic. The EU permits Diazolidinyl Urea up to 0.5% as a preservative.
Diazolidinyl Urea is used in a variety of cosmetic and personal-care formulations, particularly water-containing products requiring preservation.
It can be considered in formulations such as creams, lotions, shampoos, conditioners, cleansing products and other personal-care preparations where its preservative function is appropriate. Historical cosmetic safety assessments also describe its use as a preservative across a variety of cosmetic product types.
For cosmetic manufacturers, the appropriate use level should be determined from the applicable regulations, formulation requirements and preservation strategy. The EU maximum of 0.5% represents a finished-product regulatory limit, not the purity or assay of the raw material.
Diazolidinyl Urea should be incorporated according to the physical characteristics of the actual grade supplied. Its water solubility makes it suitable for water-containing formulations, but its behaviour should still be evaluated in the complete formulation.
Formulators should consider pH, concentration, compatibility, processing temperature, order of addition and interaction with other preservatives. Stability testing and microbiological evaluation should be performed on the finished formulation to establish the effectiveness of the complete preservation system.
Quality control is especially important for formaldehyde-releasing preservatives. Free formaldehyde can be measured using validated analytical techniques, and published analytical research specifically addresses determination of formaldehyde in cosmetic products containing Diazolidinyl Urea.
The raw-material specification should therefore distinguish between assay/purity, free formaldehyde and finished-product regulatory concentration. These are separate quality and regulatory parameters.
A Diazolidinyl Urea cosmetic ingredient manufacturer in India should provide a clearly defined product specification and batch documentation suitable for cosmetic manufacturing. Companies looking for a Diazolidinyl Urea cosmetic ingredient supplier in India can evaluate the ingredient according to identity, purity, physical characteristics, free formaldehyde, packaging, COA, SDS and batch traceability.
For Diazolidinyl Urea manufacturing in India, consistent technical characteristics are important for cosmetic manufacturers using the material in creams, lotions, shampoos and other personal-care products. Bulk buyers may require specific packaging, quantities, documentation and quality parameters according to their manufacturing requirements.
Businesses searching for a Diazolidinyl Urea bulk cosmetic ingredient supplier in India should confirm the actual commercial specification before procurement. This helps ensure that the material selected as a cosmetic raw material is suitable for the intended formulation and target market.
Swapnroop provides B2B-oriented Diazolidinyl Urea cosmetic ingredient supply, with product information focused on technical characteristics and cosmetic formulation requirements. Buyers can evaluate the ingredient based on its chemical identity, preservative functionality, physical properties, quality specifications and intended application.
For businesses seeking a Diazolidinyl Urea cosmetic ingredient manufacturer and supplier in India, Swapnroop can support evaluation for bulk cosmetic ingredient requirements, with attention to product specifications, formulation suitability, technical documentation and commercial supply needs.
| Parameter | Specification |
|---|---|
| Appearance | White or colourless crystals / white powder |
| Assay (HPLC) | NLT 99.0% |
| Loss on Drying | NMT 3.0% |
| Residue on Ignition | NMT 3.0% |
| Heavy Metals | NMT 20 ppm |
| pH (1% Solution) | 6.0–8.0 |
| Water Content | NMT 3.0% |