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Bis(Hydroxymethyl) Imidazolidinyl Urea is a formaldehyde-releasing preservative used in cosmetics to prevent microbial growth and extend product shelf life.
No specific concern data available
Safety summary
As a formaldehyde-releasing preservative, it may cause contact dermatitis or sensitization in some individuals, particularly those sensitive to formaldehyde. Its use is restricted in certain regions and concentrations.
1% line marker
This ingredient is commonly used as a marker to identify where ingredients drop below 1% concentration on the label.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.