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4-METHYL-7-GERANYLOXYCOUMARIN.

Valuable CAS 50542-90-0 / PERFUMING

A sophisticated synthetic coumarin derivative engineered to target multiple pathways in melanin production, making it a powerhouse ingredient in Japanese brightening formulations. This oil-soluble compound delivers precision melanogenesis inhibition while maintaining excellent tolerability across all skin types.

Skin brightening Melanogenesis inhibition Antioxidant Hyperpigmentation reduction

Science

Functions as a comprehensive melanogenesis disruptor by directly inhibiting tyrosinase enzyme activity and simultaneously downregulating key transcription factors (MITF, TRP-1, TRP-2). Additionally modulates PI3K/Akt and ERK signaling cascades to prevent melanin transport and maturation at the cellular level.


Research

High confidence
Effective range 0.1–1%
Optimal

0.5%

Key findings

  1. 01 B16F10 melanoma cell studies at 0.1-1.0% showed significant melanin synthesis inhibition without cytotoxicity
  2. 02 In vivo testing demonstrated measurable reduction in UV-induced hyperpigmentation
  3. 03 100 µM concentration outperformed arbutin in TRP-1 and TRP-2 expression suppression

Transparency

Not commonly dusted
Min. effective
0.05%
Red flag below
0.03%

Given its specialized nature and oil solubility requirements, this ingredient is typically used at meaningful concentrations in dedicated brightening products rather than as marketing dust.


The Formula

Solubility
Oil
Optimal pH 5 – 7.5
0 7 14

Stability

Demonstrates excellent stability in anhydrous systems and oil-in-water emulsions but degrades under strongly alkaline conditions due to coumarin ring vulnerability

Synergies

  • Vitamin C derivatives
  • Niacinamide
  • Alpha arbutin

Conflicts

  • Strong oxidizing agents
  • Highly alkaline ingredients above pH 8.0
  • Aqueous systems without proper solubilization

Safety

CIR Status
Not reviewed
Max tested
1%
Sensitization risk Low

Listed in EU Cosing database and Japanese Quasi-Drug whitelist. Unlike photoactive furocoumarins, this derivative shows no phototoxic properties.


Your Skin

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

Our Assessment

Valuable

A scientifically-backed brightening ingredient with multi-pathway efficacy and excellent safety profile, particularly valuable for targeted hyperpigmentation concerns.


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References