1,3-bis(hydroxymethyl)-5,5-dimethylimidazolidine-2,4-dione
DMDM hydantoin is a preservative that works by releasing formaldehyde into the product.
DMDM hydantoin is used in shampoos and cosmetics to prevent molds, mildews, and bacterial spoilage.
Another formaldehyde releasing preservative is imidazolidinyl urea.
DMDM Hydantoin: InChI=1/C7H12N2O4/c1-7(2)5(12)8(3-10)6(13)9(7)4-11/h10-11H,3-4H2,1-2H3
Imidazolidinyl urea: InChI=1/C11H16N8O8/c20-2-18-4(6(22)16-10(18)26)14-8(24)12-1-13-9(25)15-5-7(23)17-11(27)19(5)3-21/h4-5,20-21H,1-3H2,(H2,12,14,24)(H2,13,15,25)(H,16,22,26)(H,17,23,27)/f/h12-17H
allantoin: InChI=1/C4H6N4O3/c5-3(10)6-1-2(9)8-4(11)7-1/h1H,(H3,5,6,10)(H2,7,8,9,11)/f/h6-8H,5H2