Imidazolidinyl Urea is a synthetic preservative commonly used in cosmetics and personal care products to prevent microbial growth and extend shelf life.Imidazolidyl urea is a chemical substance, a white, fluid, hygroscopic powder (moisture absorption does not affect antibacterial activity), with a slight formaldehyde odor. The PH of a 1% aqueous solution is 6.0-7.5. This product has stable properties and should be stored in a dry and well-ventilated place. It is highly soluble in water, has very low oil solubility, and a small oil-water partition coefficient, and will not migrate out of the aqueous phase.