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Moumoujus

BUTYLATED XYLENOL.

Optional CAS 1879-09-0 / ANTIOXIDANT

A sterically hindered phenolic antioxidant that serves primarily as a formula stabilizer rather than a direct skin active. This synthetic compound protects formulations from oxidative degradation while providing secondary antioxidant benefits to skin.

Summary

Antioxidant Formula stabilizer Preservative booster

Science

Mechanism of Action

Functions as a chain-breaking antioxidant by donating hydrogen atoms from its hydroxyl group to neutralize peroxyl radicals, preventing lipid peroxidation and protecting both formula integrity and skin from oxidative stress.

Research

Clinical Evidence

Medium confidence
Effective range 0.01–1%
Optimal

0.1%

Key findings

  1. 01 Patent studies demonstrate effectiveness at 0.01-1.0% for MMP inhibition and photodamage prevention
  2. 02 Research at 0.1-3.0% shows ability to reduce allergic contact dermatitis in oxidation-sensitive formulations

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.1%
Red flag below
0.05%

Typically used at trace levels below 0.1% as a stabilizer, making dusting uncommon since effective concentrations are already very low

The Formula

Formulation

Solubility
Oil
Optimal pH 3.5 – 9
0 7 14

Stability

Thermally stable under normal storage conditions. Hydrophobic nature requires incorporation into oil phases of emulsions.

Synergies

  • Other antioxidants for enhanced stability
  • Volatile fragrance components for protection

Conflicts

  • Strong oxidizing agents
  • Iron and copper salts
  • Strong alkaline conditions

Safety

Safety Profile

CIR Status
Not reviewed by CIR
Max tested
1%
Sensitization risk Moderate

Classified as skin and eye irritant at high concentrations under GHS. Generally used at trace levels in cosmetic applications.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

A behind-the-scenes ingredient that enhances formula stability rather than delivering primary skin benefits.

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