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Moumoujus

DM HYDANTOIN.

Avoid CAS 77-71-4 / HAIR CONDITIONING, VISCOSITY CONTROLLING

While DM Hydantoin typically refers to a precursor molecule, in cosmetic applications, this ingredient profile refers to DMDM Hydantoin, a broad-spectrum antimicrobial preservative. Its primary function is to extend product shelf life by preventing the growth of fungi, yeast, and bacteria, thereby ensuring product stability and protecting against potential skin infections.

Summary

preservative antimicrobial formaldehyde releaser

Science

Mechanism of Action

DMDM Hydantoin functions as an antimicrobial preservative by slowly releasing trace amounts of formaldehyde into the product. This formaldehyde creates an unfavorable environment for microorganisms, effectively inhibiting their proliferation and safeguarding the formulation from microbial contamination.

Research

Clinical Evidence

High confidence
Effective range 0.1–0.6%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

DM Hydantoin (as DMDM Hydantoin) is a functional ingredient critical for preventing microbial spoilage and ensuring product safety and shelf life, thus it is not typically 'dusted' for marketing purposes without a genuine role.

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 10
0 7 14

Stability

Retains its activity across a broad pH range from 3 to 10. For optimal stability and to prevent decomposition during manufacturing, it should be incorporated into formulations at temperatures below 40°C, or at a maximum of 60°C/140°F.

Safety

Safety Profile

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

The Cosmetic Ingredient Review (CIR) considers DMDM Hydantoin safe at current usage levels, with the understanding that the free formaldehyde concentration should not exceed 0.2%. The European Union approves it up to 0.6%, while the FDA permits up to 1% in the USA. However, DMDM Hydantoin is a known formaldehyde releaser and is recognized by the FDA as a potential allergen, contributing to contact dermatitis in approximately 8-9% of the U.S. population. While formaldehyde is classified as a human carcinogen by HHS, exposure from cosmetic use is deemed minimal, comparable to natural occurrences in food, with carcinogen risks primarily linked to high, long-term occupational exposure. California's Prop 65 requires a warning due to the release of trace amounts of formaldehyde. This profile is based on data for DMDM Hydantoin, the commonly recognized cosmetic ingredient.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Despite its efficacy as a broad-spectrum preservative essential for product integrity, the inherent release of formaldehyde and the associated high risk of sensitization and contact dermatitis make this ingredient one to avoid, particularly for sensitive skin types.

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