Imidazolidinyl Urea is an antimicrobial preservative used in cosmetics. It is chemically related to diazolidinyl urea which is used in the same way. Imidazolidinyl urea acts as a formaldehyde releaser.
Imidazolidinyl Urea kills microorganisms, or prevents or inhibits their growth and reproduction.
Preventing the growth of microbes protects cosmetics and personal care products from spoiling.