Imidazolidinyl urea is an antimicrobial preservative used in cosmetics[citation needed]. It is chemically related to diazolidinyl urea which is used in the same way. Imidazolidinyl urea acts as a formaldehyde releaser.
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IUPAC name
11'-methylenebis3-[1-(hydroxymethyl)-25-dioxoimidazolidin-4-yl]urea, Correct new structure (upper pic.):, Erroneous old structure (lower pic.):, 11'-methylenebis3-[4-(hydroxymethyl)-25-dioxoimidazolidin-4-yl]urea
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