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Moumoujus

METHYL BENZOPHENONE.

Questionable CAS 134-84-9 / LIGHT STABILIZER

Methyl Benzophenone is a chemical compound primarily utilized in skincare and cosmetic formulations for its ability to absorb ultraviolet A (UVA) radiation and stabilize product integrity against light-induced degradation.

Summary

UV Absorber Light Stabilizer

Science

Mechanism of Action

Operating as a photoprotective agent, Methyl Benzophenone effectively absorbs UVA rays, thereby contributing to the prevention of sun-induced skin damage. Beyond its direct skin benefits, it functions as a critical light stabilizer within product formulations, safeguarding sensitive ingredients like fragrances and colorants from UV-induced breakdown and extending product shelf life.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

This compound demonstrates inherent stability under standard temperature and pressure conditions. Optimal storage involves a cool, dry, and well-ventilated environment within a tightly sealed container.

Conflicts

  • Concentrated acids
  • Strong bases
  • Reactive metals

Safety

Safety Profile

CIR Status
Safe as used with qualifications
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed a broad range of benzophenone derivatives, affirming their safety for topical cosmetic application under specified practices. This assessment included Benzophenone-10, which shares structural similarities as a 4'-methyl derivative of Benzophenone-3; however, 4-Methylbenzophenone (CAS 134-84-9) is chemically distinct from Benzophenone-10. The FDA has requested additional data for certain benzophenones (BP-3, -4, -8) to determine their Generally Recognized As Safe and Effective (GRASE) status as sunscreens. Specifically for 4-Methylbenzophenone, some reports have classified it as a non-genotoxic carcinogen in the context of food packaging contamination, though in vitro micronucleus assays did not find genotoxic effects. There are no identified specific SCCS opinions or direct FDA rulings for 4-Methylbenzophenone as a cosmetic ingredient. It is important to note that the parent compound, Benzophenone, was removed from a food additive list due to animal cancer studies, and a medium irritancy potential has been reported for Methyl Benzophenone.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

While recognized by CIR in a broader family assessment, specific cosmetic efficacy data is lacking, and contextual concerns regarding carcinogenicity warrant careful consideration for its inclusion in precision skincare.

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