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Moumoujus

DROMETRIZOLE.

Valuable CAS 2440-22-4 / UV ABSORBER

Drometrizole functions as a vital UV absorber within cosmetic formulations, safeguarding product integrity by preventing degradation from light exposure. While incorporated into various skincare items, it is not an active sunscreen agent designed to protect skin directly.

Summary

UV Absorber

Science

Mechanism of Action

Drometrizole operates by absorbing ultraviolet (UV) radiation and subsequently converting this energy into less damaging forms, thereby inhibiting UV rays from causing deterioration to cosmetic and personal care products. Although utilized in skincare, it is explicitly not approved as an active UV-protective ingredient for direct skin protection in regulatory regions like the United States or Europe.

Research

Clinical Evidence

High confidence
Effective range 0.03–1%
Optimal

1%

Key findings

  1. 01 Extensive testing at 1% demonstrated non-irritating properties in a single insult patch test, with 300 patients showing no irritation or eczematous reactions over 8 weeks of daily application.
  2. 02 Clinical evaluations of cosmetic and personal care products containing Drometrizole between 0.03% and 1.0% revealed no irritation, sensitization, photosensitization, or phototoxicity across 436 subjects.

Transparency

Dusting Analysis

Not commonly dusted

No research data suggests that Drometrizole is commonly 'dusted' or included at concentrations beyond its functional or regulatory limits for marketing purposes.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Drometrizole exhibits robust stability against both light and heat, contributing to its effectiveness in preserving product integrity.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
1%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded Drometrizole is safe for cosmetic use, with the Korean Ministry of Food and Drug Safety (MFDS) revising its maximum regulatory concentration to 1% in 2015. While maximization tests showed negative for skin sensitization, rare consumer case reports of allergic contact dermatitis have been noted. The ingredient demonstrates low acute toxicity and has shown no evidence of teratogenicity or carcinogenicity in studies. The FDA lists Drometrizole as an indirect food additive.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Drometrizole is a valuable ingredient for enhancing the stability and longevity of cosmetic formulations by absorbing UV light, demonstrating a generally low irritation and sensitization profile for skin, though not intended as an active skin sunscreen.

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