Diazolidinyl Urea
What Diazolidinyl Urea is & what it does
A broad-spectrum, formaldehyde-releasing preservative effective against bacteria and fungi. It is potent but can trigger reactions in formaldehyde-sensitive people.
What does Diazolidinyl Urea do in skincare?
Diazolidinyl Urea is a preservative used in skincare and sunscreen formulas to help prevent the growth of bacteria and other microbes. By protecting the product from contamination, it helps maintain stability and shelf life. It is part of a group of formaldehyde-releasing preservatives.
Is Diazolidinyl Urea safe?
Diazolidinyl Urea is an approved cosmetic preservative used within established concentration limits to keep products free of microbial growth. It can be a contact allergen for some people, particularly those sensitive to formaldehyde-releasing preservatives, so patch testing may help if you have known sensitivities. This is general information and not medical advice.
Is Diazolidinyl Urea natural or synthetic?
Diazolidinyl Urea is a synthetic preservative and does not occur naturally in this form. It is manufactured for use in cosmetic and personal care products. It contains no animal-derived material, so it is generally considered suitable for vegan formulations.
Sunscreens with Diazolidinyl Urea
We rate 68 sunscreens that contain it, showing the top 10 by overall score:
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Ajanta Pharma Ltd Sunstop Gold Sunscreen SPF 55
89/100
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Ziaja Sun Lotion In Spray SPF 50+
88/100
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SunSense Anti-Ageing Face Spf 50+ Sunscreen
87/100
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Mediscience UV Care Shield Dry Touch SPF 50+
85/100
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Doctor Eckstein Sun Shield SPF 50
81/100
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Seventeen Daily Cream With Pomegranate & Aloe Vera SPF 50+
78/100
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Zymogen Long-lasting Power Sun Cream
76/100
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Ziaja Med Soothing Cream SPF 6 Anti-redness
76/100
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Belcosmex Sun Tropez SPF 30 Ufa-ufb
75/100
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Eva Cosmetics Sun & Sea Face Sunscreen SPF 50+
74/100