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Moumoujus

4-ETHYLRESORCINOL.

Valuable CAS 2896-60-8 / ANTIMICROBIAL, HAIR DYEING

A precision-targeted tyrosinase inhibitor that addresses hyperpigmentation through dual-action melanin suppression and antioxidant protection. This alkyl-substituted resorcinol derivative demonstrates superior hypopigmentary activity compared to related compounds while maintaining excellent skin tolerability. Clinical research validates its effectiveness at reducing dark spots through downregulation of key pigment-producing enzymes.

Summary

skin brightening antimicrobial antioxidant tyrosinase inhibitor

Science

Mechanism of Action

Blocks melanin production by inhibiting tyrosinase enzyme activity and suppressing TRP-2 protein expression at both genetic and cellular levels, while simultaneously disrupting the PKA signaling pathway and providing lipid peroxidation protection

Research

Clinical Evidence

High confidence
Effective range 0.1–2%
Optimal

1%

Key findings

  1. 01 Demonstrated significant melanin synthesis inhibition at 10-40 μM concentrations with TRP-2 downregulation
  2. 02 Exhibited antioxidant efficacy with lipid peroxidation IC50 of 38.4 μM
  3. 03 Outperformed 4-ethylphenol in melan-a cell hypopigmentation models

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.05%
Red flag below
0.01%

Effective concentrations start at 0.1%, making trace amounts below 0.05% insufficient for pigmentation benefits

The Formula

Formulation

Solubility
Both
Optimal pH 5 – 7
0 7 14

Stability

Photosensitive compound requiring opaque packaging; oxidation-prone with browning at alkaline pH above 8.0; maintains optimal stability in acidic to neutral environments

Synergies

  • Vitamin C
  • Niacinamide
  • Alpha Arbutin

Conflicts

  • Strong oxidizers
  • Highly alkaline environments
  • Ferric salts

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
2%
Sensitization risk Moderate

Safe usage range 0.1-2%; resorcinol derivatives may cause sensitization at elevated concentrations; lacks comprehensive regulatory assessment compared to related compounds

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Clinically-proven tyrosinase inhibitor with strong efficacy data and broad skin compatibility, though requiring careful formulation for stability.

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