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BETULA LENTA TWIG EXTRACT.

Valuable CAS 85251-66-7 / PERFUMING

A botanical distillate derived from the Sweet Birch tree, characterized by its exceptionally high natural content of methyl salicylate. It serves as a potent skin-conditioning agent and topical analgesic, frequently utilized in precision formulations targeting localized inflammation and muscular recovery.

Skin conditioning Topical analgesic Anti-inflammatory Fragrance component

Science

The extract functions as a natural counter-irritant by inhibiting the cyclooxygenase (COX) enzyme, which effectively disrupts the biosynthesis of pro-inflammatory prostaglandins. Upon application, it induces a sensory-shifting thermal effect—initial cooling followed by gentle warming—to modulate pain perception and improve microcirculation.


Research

High confidence
Effective range 2–3%
Optimal

2.5%

Key findings

  1. 01 Topical application at 2.0-3.0% demonstrates significant reduction in musculoskeletal inflammation and localized pain through its methyl salicylate content.

Transparency

Commonly dusted
Min. effective
2%
Red flag below
0.1%

In many commercial products, this extract is 'dusted' at concentrations as low as 15 ppm (0.0015%) to claim botanical benefits or provide a minty aroma. However, therapeutic anti-inflammatory and counter-irritant properties are only achieved at concentrations between 2% and 3%.


The Formula

Solubility
Oil
Optimal pH 4.5 – 7
0 7 14

Stability

Highly sensitive to alkaline environments; at a pH above 8.0, the active methyl salicylate can undergo hydrolysis, breaking down into salicylic acid and methanol.

Synergies

  • Menthol
  • Camphor
  • Carrier oils for enhanced penetration

Conflicts

  • Strong alkalis
  • Oxidizing agents

Safety

CIR Status
Safe as used
Max tested
3%
Sensitization risk Moderate

Safety is concentration-dependent. The CIR panel restricts leave-on use to 3.0% to prevent systemic absorption of salicylates and potential skin sensitization.


Your Skin

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

Our Assessment

Valuable

An efficacious botanical active for soothing inflammation and physical discomfort when formulated at its clinical threshold of 2-3%.


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