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Moumoujus

PEG-15 DEDM HYDANTOIN.

Questionable CAS 68130-12-1 / ANTIMICROBIAL

This ingredient functions primarily as an antimicrobial preservative in cosmetic formulations. It extends product shelf life by inhibiting microbial growth, effectively safeguarding against bacteria, yeast, and fungi through the slow release of formaldehyde. While effective, its use is carefully regulated due to potential for sensitization.

Summary

Preservative Antimicrobial Fungicide (mild)

Science

Mechanism of Action

This ingredient acts as a broad-spectrum antimicrobial by gradually releasing small amounts of formaldehyde into the formulation. This formaldehyde creates an environment unfavorable for the proliferation of various microorganisms, including gram-positive and gram-negative bacteria, yeast, and fungi. This sustained antimicrobial action prevents spoilage and maintains the integrity and safety of personal care products over time.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–0.6%
Optimal

0.1%

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 9
0 7 14

Stability

This preservative exhibits robust stability and activity across a broad pH spectrum, optimally functioning between pH 3 and 9, and remaining effective even up to pH 10. Its water solubility facilitates easy integration into formulations at room temperature, and it can withstand processing temperatures up to 80°C for short durations. It demonstrates compatibility with a wide array of cosmetic ingredients, including anionic, cationic, and non-ionic surfactants, as well as various fragrances.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
0.6%
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed this ingredient safe at current average usage levels (0.074%). However, as an aqueous formaldehyde donor, instances of skin irritation may be linked to this formaldehyde release. While formaldehyde itself is restricted to 0.2% due to sensitization concerns, the amount liberated by this ingredient in most cosmetic products is typically below this limit. The Scientific Committee on Consumer Safety (SCCS) has expressed reservations regarding the adequacy of the 0.05% formaldehyde labeling threshold for sensitized individuals, advocating for a significantly lower total free formaldehyde limit of 0.001% (10 ppm) for improved consumer protection.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Medium
Comedogenicity Unknown

Our Assessment

Verdict

Questionable

Despite its efficacy as a broad-spectrum preservative and CIR's 'safe as used' status, the moderate irritancy and SCCS recommendations for stricter formaldehyde limits make this ingredient questionable for precision skincare, particularly for sensitive individuals.

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