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Formaldehyde (reiterating for F)

A potent antimicrobial agent (see detailed entry under D – Diazolidinyl Urea, which releases formaldehyde).

Category/Notes

Preservative (antimicrobial)

Benefits

Prevents product spoilage by killing bacteria/fungi, thereby indirectly protecting skin from infections (but due to safety concerns, direct use is rare in leave-on skincare; see notes under D). Formaldehyde-releasing preservatives are used in trace amounts to achieve these benefits.

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Formaldehyde (reiterating for F)

June 23, 2025

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