Science
Mechanism of Action
This ingredient functions as an antimicrobial, safeguarding formulations against spoilage by controlling the growth of various microorganisms, including bacteria and fungi. Similar to related hydantoin-based preservatives like DMDM Hydantoin, its broad-spectrum action is achieved via the slow release of formaldehyde through the hydrolytic cleavage of an N-hydroxymethyl group.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Studies on the related compound DMDM Hydantoin indicate it is considered safe by the CIR Expert Panel at usage levels of 0.074%.
- 02 The EU Cosmetics Directive approves DMDM Hydantoin for use up to a maximum concentration of 0.6%.
- 03 Typical use concentrations for DMDM Hydantoin in products range from 0.15% to 0.4%.
- 04 At 1% concentration in a cream, DMDM Hydantoin induced dermatitis in 33% of formaldehyde-allergic patients, with 0.25% still causing dermatitis in one such patient and itching in another.
- 05 A 1% concentration of DMDM Hydantoin in shampoo, containing 0.02% free formaldehyde, showed a low likelihood of skin sensitization induction for healthy individuals.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Based on DMDM Hydantoin data: The ingredient is stable and active within a pH range of 3-8, retaining activity up to pH 9. For optimal integration and to prevent decomposition, it should be incorporated at temperatures below 40°C, though it can tolerate up to 80°C. Prolonged exposure below 10°C may lead to crystallization. It is susceptible to aqueous hydrolysis with half-lives of less than 1 day at pH 7 and 9, but no hydrolysis occurs at pH 4. The optimal pH range for the active content of DMDM Hydantoin itself (55-58% active) is 5.50-7.50.
Safety
Safety Profile
While the Cosmetic Ingredient Review (CIR) Expert Panel considers DMDM Hydantoin safe at current usage levels (0.074%) and the EU Cosmetics Directive approves it up to 0.6%, it is crucial to note that most safety data pertains to DMDM Hydantoin, a known formaldehyde donor. The FDA acknowledges formaldehyde-releasing chemicals as potential allergens, with approximately 8-9% of the U.S. population potentially sensitive. Clinical observations directly link skin irritation to formaldehyde release, particularly in formaldehyde-allergic individuals. The Environmental Working Group (EWG) rates DMDM Hydantoin 'HIGH' for 'Allergies & Immunotoxicity,' indicating that individuals with sensitive skin or chronic dermatitis may want to avoid or limit its use.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While PEG-5 DEDM Hydantoin functions as an effective antimicrobial to prevent product spoilage, its close chemical relation to formaldehyde-releasing DMDM Hydantoin mandates caution, particularly for sensitive individuals or those with known formaldehyde allergies due to potential sensitization.
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