Diazolidinyl Urea

EWG level: 6

Diazolidinyl Urea is a fine white powder. Diazolidinyl Urea can be found in many cosmetic and personal care product types including eye and facial makeup, aftershave, and nail, bath, hair and skin care products. This is an antimicrobial preservative that works by forming formaldehyde in cosmetic products. Diazolidinyl Urea prevents or retards bacterial growth, and thus protects cosmetics and personal care products from spoilage. This helps to protect the product from inadvertent contamination by the consumer during use. Diazolidinyl Urea works by slowly releasing a small amount of formaldehyde into the formlation.

Function: Preservative.

Allergies Concern, “Human skin toxicant or allergen – strong evidence” (Cosmetic Ingredient Review Assessments) “Limited evidence of immune system toxicity or allergies”  (National Library of Medicine HazMap)

Concerns, “Not suspected to be persistent andbioaccumulative” (Environment Canada Domestic Substance List)

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