Correct new structure: 1-[3,4-bis(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]-1,3-bis(hydroxymethyl)urea
Erroneous old structure: 1-[1,3-bis(hydroxymethyl)-2,5-dioxoimidazolidin-4-yl]-1,3-bis(hydroxymethyl)urea
|Molar mass||278.22 g/mol|
|GHS signal word||WARNING|
|P261, P272, P280, P302+352, P333+313, P321, P363, P501|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is: / ?)(|
It is used in many cosmetics, skin care products, shampoos and conditioners, as well as a wide range of products including bubble baths, baby wipes and household detergents. Diazolidinyl urea is found in the commercially available preservative Germaben.
Commercial diazolidinyl urea is a mixture of different formaldehyde addition products including polymers.
Diazolidinyl urea is produced by the chemical reaction of allantoin and formaldehyde in the presence of sodium hydroxide solution and heat. The reaction mixture is then neutralized with hydrochloric acid and evaporated:
Diazolidinyl urea was poorly characterized until recently and still has a wrong CAS structure assigned to it. New data show that the hydroxymethyl functional group of the imidazolidine ring is attached to the carbon, not the nitrogen atom:
|Hoeck structure||previous structure|
- HSNO Chemical Classification Information Database, New Zealand Environmental Risk Management Authority, retrieved 2009-09-06
- Lehmann, Søren Vig; Hoeck, Ulla; Breinholdt, Jens; Olsen, Carl Erik; Kreilgaard, Bo (2006). "Characterization and chemistry of imidazolidinyl urea and diazolidinyl urea". Cont. Dermat. 54 (1): 50–58. doi:10.1111/j.0105-1873.2006.00735.x. PMID 16426294.
- Review of toxicological data (NTP NIEHS)
- Zug KA, Warshaw EM, Fowler JF Jr, Maibach HI, Belsito DL, Pratt MD, Sasseville D, Storrs FJ, Taylor JS, Mathias CG, Deleo VA, Rietschel RL, Marks J. Patch-test results of the North American Contact Dermatitis Group 2005–2006. Dermatitis. 2009 May–Jun;20(3):149-60.