Camphor

同義語： 1,7,7-Trimethylbicyclo[2.2.1]heptan-2-one, Gum camphor, Laurel camphor, Formosa camphor, 2-Bornanone, 2-Camphanone

Camphor is a bicyclic monoterpene ketone with a rigid, cage-like carbon skeleton. Its molecular structure consists of a cyclohexane ring fused to a cyclopentane ring, with a ketone group at the C-2 position and two methyl groups at C-7. This compact, highly substituted framework gives camphor its characteristic spherical shape and lipophilic character, allowing it to readily penetrate biological membranes and interact with a wide range of molecular targets. The ketone moiety is key to its reactivity, forming the basis for many derivatives, while the hydrocarbon backbone contributes to its volatility and distinctive aromatic odor.

Camphor occurs naturally in the wood of the camphor laurel (Cinnamomum camphora) and in certain other plants such as rosemary and lavender. It can be obtained by steam distillation of camphorwood followed by purification, or produced synthetically from turpentine oil via camphene. Commercial camphor is typically supplied as white crystalline powder, flakes, or blocks, with purity grades ranging from technical to pharmacopeial (USP/EP/BP). It is a versatile intermediate and active ingredient used in pharmaceuticals, personal care, flavors, fragrances, and industrial applications.

In the pharmaceutical and personal care industries, camphor is valued for its counterirritant, analgesic, and antimicrobial properties. It is a common component of topical ointments, balms, and liniments intended for muscle aches, minor cuts, and insect bites. In flavors and fragrances, it imparts a fresh, minty, and woody note. As a plasticizer, camphor is used in the production of celluloid and other cellulose esters. Its unique combination of volatility, solubility, and biological activity makes it a staple in many formulation laboratories.

化学構造と性質

Camphor is a terpenoid ketone with the molecular formula C10H16O. It exists as a white, crystalline solid with a melting point around 175–177 °C and a boiling point of 204 °C. The molecule is chiral, with two enantiomeric forms: (1R,4R)-camphor (the natural isomer) and (1S,4S)-camphor. It is practically insoluble in water but freely soluble in organic solvents such as ethanol, ether, and chloroform. Camphor exhibits a characteristic pungent, aromatic odor and is volatile at room temperature. Its lipophilic nature and small molecular size facilitate rapid absorption through the skin and mucous membranes.

作用機序

• TRPV1 activation: Camphor selectively activates the transient receptor potential vanilloid 1 (TRPV1) channel, leading to desensitization of sensory neurons and a reduction in pain perception.
• TRPM8 activation: It also activates the cold-sensing TRPM8 receptor, producing a cooling sensation that can help alleviate itching and irritation.
• Local anesthetic effect: By blocking sodium channels in nerve endings, camphor provides mild local anesthesia and relieves pain.
• Antimicrobial activity: Camphor disrupts microbial cell membranes and inhibits the growth of certain bacteria and fungi, contributing to its use in topical antiseptics.
• Counterirritant action: When applied to the skin, camphor stimulates blood flow and creates a warming sensation that can distract from deeper pain.

品質仕様

供給および書類

• 容量: 200 metric tons per year
• リードタイム: 3～5営業日（在庫品）
• ドキュメント: COA, MSDS, TDS, and other regulatory documents available upon request
• パッケージ: 25 kg fiber drum with double polyethylene liner, or customized packaging

見積依頼

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