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This refers to a category of preservatives that slowly release small amounts of formaldehyde over time to prevent microbial growth in products. Examples include Diazolidinyl Urea and Imidazolidinyl Urea.
No specific concern data available
Safety summary
These agents are generally considered safe at regulated concentrations, but some individuals may experience contact allergies. Those with formaldehyde sensitivity should avoid them.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.