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Moumoujus

CAMPHOR.

Valuable CAS 464-49-3 / 76-22-2 / DENATURANT, FRAGRANCE, PLASTICISER

A naturally occurring terpenoid traditionally harvested from the Cinnamomum camphora tree, utilized in precision skincare for its rapid-acting sensory modulation. It serves as both a localized analgesic and a potent chemical penetration enhancer that optimizes the delivery of co-formulated actives.

Summary

Soothing Penetration Enhancer Counter-irritant Analgesic Fragrance Masking

Science

Mechanism of Action

Camphor operates as a counter-irritant by selectively activating and then desensitizing specific Transient Receptor Potential (TRP) ion channels, including TRPV1, TRPV3, and TRPM8. This process induces a characteristic biphasic cooling-to-warming sensation that mitigates pain and pruritus while promoting local vasodilation. Furthermore, it disrupts the organized lipid bilayer of the stratum corneum to facilitate the transdermal passage of other molecules.

Research

Clinical Evidence

High confidence
Effective range 0.1–11%
Optimal

3%

Key findings

  1. 01 FDA OTC Monograph M017: Established concentrations between 3% and 11% as effective for topical pain and itch relief via sensory nerve desensitization.
  2. 02 NIH PubMed 24316345: Demonstrated that a 5% concentration induces immediate dose-dependent thermal sensations and significantly increases local cutaneous blood flow.

Transparency

Dusting Analysis

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

Camphor is rarely 'dusted' because its distinct aromatic profile and sensory impact are detectable even at low concentrations. However, levels below 0.1% are generally insufficient for physiological counter-irritant benefits and serve only as fragrance masking agents.

The Formula

Formulation

Solubility
Oil
Optimal pH 4.5 – 6
0 7 14

Stability

Camphor is highly volatile and prone to sublimation at room temperature; formulations must be housed in airtight, light-resistant packaging to maintain potency. While chemically stable between pH 4.0 and 8.0, it is ideally formulated at skin-neutral levels.

Synergies

  • Lipid-soluble actives (enhanced via penetration enhancement)
  • Cooling agents

Conflicts

  • Menthol (creates eutectic liquid)
  • Thymol (creates eutectic liquid)
  • Salicylic acid
  • Strong oxidizing agents
  • Phenol

Safety

Safety Profile

CIR Status
Not reviewed (FDA established)
Max tested
11%
Sensitization risk Moderate

Strictly prohibited for use on broken or abraded skin due to the risk of rapid systemic absorption and potential toxicity. Usage is capped at 3% in Canadian cosmetic products and 11% for US OTC drug products.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A high-performance sensory and penetration-boosting ingredient that provides immediate relief for oily and normal skin types, provided it is formulated to avoid eutectic reactions.

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