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Moumoujus

8-HYDROXYDAIDZEIN.

Valuable CAS 75187-63-2 / ANTIOXIDANT, BLEACHING, SKIN CONDITIONING

A potent isoflavone derivative that acts as an irreversible tyrosinase inhibitor, delivering exceptional skin brightening results. Clinical studies demonstrate it outperforms traditional brightening agents like kojic acid and vitamin C derivatives at significantly lower concentrations.

Summary

antioxidant skin brightening tyrosinase inhibitor melanogenesis suppressor

Science

Mechanism of Action

Functions as a 'suicide substrate' that forms irreversible covalent bonds with tyrosinase enzyme, permanently inactivating melanin production through the cresolase pathway. Additionally modulates MC1R signaling by inhibiting MITF expression and CREB phosphorylation, downregulating key melanogenic enzymes TYRP-1 and TYRP-2.

Research

Clinical Evidence

High confidence
Effective range 2–4%
Optimal

4%

Key findings

  1. 01 Human study at 4% showed significant skin lightening (dL* values from -0.57 to 1.94) after 8 weeks, superior to 2% ascorbic acid-2-glucoside
  2. 02 In vitro testing at 10 μM reduced tyrosinase activity to 20.1% of control and melanogenesis to 51.8%, with 10-fold greater potency than kojic acid

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

Powerful activity at low concentrations makes sub-0.5% amounts likely ineffective for meaningful brightening results

The Formula

Formulation

Solubility
Both
Optimal pH 5 – 6.5
0 7 14

Stability

Extremely pH-sensitive with complete degradation within 24 hours at pH 8-9. Maintains >85% stability for 20+ days in acidic conditions (pH 5-6) following first-order degradation kinetics

Conflicts

  • alkaline solutions
  • high pH buffers
  • oxidizing agents

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
4%
Sensitization risk Low

Clinical trials up to 4% showed no adverse effects. Pure substance carries GHS toxicity warning if ingested, but cosmetic safety data from CIR/SCCS not available

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Exceptionally potent brightening agent with unique irreversible mechanism, though formulation challenges and limited safety data require careful consideration.

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