Imidazolidinyl urea

Imidazolidinyl urea (CAS 39236-46-9), also known as Imidurea, is a synthetic antimicrobial preservative used in personal care and pharmaceutical manufacturing.

Where is Imidazolidinyl urea used?

• Cosmetic formulations such as lotions, shampoos and conditioners: protection against microbial contamination throughout the use cycle
• Liquid soaps and hair care products: broad-spectrum coverage at lower individual concentrations when paired with parabens or other preservatives
• Pharmaceutical topical preparations such as creams and gels: maintenance of sterility standards during storage
• Wet wipes and rinse-off products: antimicrobial preservation
• It releases formaldehyde at controlled levels to inhibit bacterial and fungal growth.

Good to know: Frequently paired with parabens or other preservatives to achieve broad-spectrum coverage at lower individual concentrations. Particularly effective where water activity creates a high risk for microbial proliferation.

Commercial specifications

• Cosmetic-grade and pharmaceutical-grade material; the latter conforms to USP and BP specifications for quality and purity
• Bulk quantities for large-scale industrial formulators
• Smaller packaging options for compounding needs or quality assurance evaluation in laboratory settings