What is it?
Imidazolidinyl Urea is a preservative commonly found in a variety of cosmetics and pharmaceutical topical preparations. 

How can I avoid it? 
Discontinuation of use of products containing imidazolidinyl urea should result in improvement and/or resolution of your dermatitis. Imidazolidinyl urea allergic patients should avoid this preservative by examining the ingredient labels before purchase. Imidazolidinyl urea is frequently found in products that carry the “hypoallergenic” label. Here is a partial list of products known to have contained imidazolidinyl urea in the past.

Skin contact with imidazolidinyl urea is required for it to cause a rash. Discontinuation of exposure to products containing imidazolidinyl urea should result in improvement and/or resolution of your dermatitis. By law, all products made in the U.S. for topical use have the ingredients listed either on the product package or the box that contains it, so check the labeling of your skin care products for this ingredient. If there is no information ask your pharmacist or call the company directly. At work, request a Safety Data Sheet (SDS) to help identify potential sources of exposure.

  • Skin Care Products / Cosmetics 
    • Antiperspirants / Deodorants 
    • Hair sprays, gels, tonics and lotions 
    • Hair Colorants / “Permanents-Relaxers” 
    • Make-ups and make-up remover
    • Moisturizers
    • Nail Polish / Nail Polish Remover 
    • Powders / Sprays 
    • Shampoos / Conditioners 
    • Shaving products 
    • Soaps / Cleansers 
    • Sunscreens and Self-Tanners
  • Medications, topical, prescription and over the counter such as 
    • Anesthetics 
    • Antiseptics
    • Contents of Vitamin E capsules used topically 
    • Creams, Ointments, Solutions 
    • Foot And Other Powders 
    • Nasal Decongestants 
    • Herbal remedies, including Traditional Chinese Medications 
    • Wound Dressings 
    • Burn remedies 
  • Pet care products
Other names for Imidazolidinyl Urea: 
  • (N1)1-(Hydroxymethyl)-2,5-dioxo-4-imidazolidinyl urea 
  • Biopure 100 
  • Germall 115
  • Imidurea 1 of 2 MCS7562-202rev0814
  • Imidurea NF
  • N,N-Methylenebis
  • N,N-Methylenebisn1-)1-(nydroxymethyl)-2,5-dioxo-4-imidazolidinyl urea
  • Sept 115
  • Tristat 1 U
  • Unicide U-13
  • Euxy K 200 Abiol
Potential cross-reacting/co-reacting substances
  • Formaldehyde and other formaldehyde-releasing preservative 
    • 2-bromo-2-nitropropane-1(bronopol)
    • Bromonitropropanediol
    • Diazolidinyl urea
    • DMDM hydantoin
    • Quaternium-15
    • Tris (hydroxymethyl) nitromethane
    • Sodium Hydroxymethylglycinate

How safe is it?

Hang tight. We're thinking.