DMDM Hydantoin is a preservative which kills fungi, yeast & bacteria. Preservatives are a way to ensure that our cosmetics and personal care products are safe. Without preservatives, products can spoil or become contaminated with bacteria.
DMDM hydantoin is found primarily in cosmetic products.
How can I avoid it?
Skin contact with DMDM Hydantoin is required for it to cause a rash. Discontinuation of exposure to products containing DMDM Hydantoin should result in improvement and/or resolution of your dermatitis. The most common cause of allergic contact dermatitis from DMDM Hydantoin is cosmetics preserved with this chemical. By law, all products made in the US for topical use have the ingredients listed either on the product package or the box that contains it, so check the labeling of ingredients in your cosmetics. At work, request a material safety data sheet (MSDS) to help identify potential sources of exposure.
Some individuals who are allergic to formaldehyde are also sensitive to DMDM Hydantoin, since DMDM Hydantoin releases small amounts of formaldehyde. DMDM Hydantoin sensitive individuals may need to avoid preserved with formaldehyde or formaldehyde-releasing agents, such as:
Imidazolidinyl urea (Germall)
Tris nitromethane (Tris Nitro) - Tris Nitro is an industrial biocide and is not usually found in skin, hair or cosmetic
Here is a partial list of products known to have contained DMDM Hydantoin in the past.
Antiarrhythmic and anticonvulsive agents
Color photography / Copying paper
Polymers and plastics
Skin Care Products / Cosmetics
Hair care products
Hair Colorants / “Permanents-Relaxers”
Soaps / Cleansers/ Household detergents
Shampoos / Conditioners
Moisturizers / lotions
Powders / Sprays
Medications, topical, prescription and over the counter such as:
Creams, Ointments, Solutions
Foot and other powders
Traditional Chinese Medications
Textile sizing agents
Other names for DMDM Hydantoin:
Glydant Plus® (95:5 mixture of DMDM and iodo propynyl)
Free of the following top common allergy causing ingredients
Common Preservative Free
Free of formaldehyde and the most common allergy causing preservatives such as benzalkonium chloride, formaldehyde, benzophenone, methyldibromo glutaronitrile, MCI/MI and others.
Free of fragrances and the most common allergy causing botanicals such as balsam of peru, cinnamic aldehyde, propolis (bee glue) and many more.
Free of allergy causing parabens and related esters such as benzocaine, PPD and others.
Free of allergy causing lanolins, esters, waxes and other wool related ingredients.
Free of coconut and related allergy causing coconut derivatives
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Free of topical antibiotics such as neomycin and bacitracin.
Free of Methylisothiazolinone, Methylchloroisothiazolinone and related kathon-like ingredients.
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Free of ADDED gluten and other wheat-related ingredients, including barley, rye and oat. However, highly processed ingredients derived from wheat, barley, rye, and oat (e.g., glycerin or tocopherol) will not be excluded by SkinSAFE
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Free of the vehicle (gives substance) propylene glycol and similar vehicles.
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Free of the top common allergy causing ingredients (fragrances, preservatives, topical antibiotics, sunscreens and metals), surfactants (cocamidopropyl betaine) and harmful hormone-altering chemicals and ingredients.
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