Cracked peppercorns on warm wood. Beta-caryophyllene is the dry, spicy rasp you smell when you grind black pepper over a hot plate — aromatic heat without the sting, anchored by a dusty, clove-like undertow.
Dry woody-pepper on first contact — not the sharp, trigeminal heat of piperine, but the aromatic warmth of cracked peppercorn shells. A clove-like undertone surfaces quickly, drier and less sweet than eugenol itself. Faintly balsamic in the base, like aged copaiba resin. More persistent than alpha-pinene, less tenacious than patchouli alcohol. On blotter, the woody-spicy character holds for hours before fading into a quiet, clean residue that reads almost mineral.
Evolution over time
Immediately
Immediately
Sharp peppercorn crack. Dry, aromatic spice with a woody edge. No sweetness.
After a few hours
After a few hours
Clove-like warmth develops. Balsamic resinous undertone from the copaiba-adjacent character. Woody-spicy heart, stable and even.
After a few days
After a few days
Quiet, clean woody residue. Almost mineral. The spice fades but the dry wood skeleton persists with moderate tenacity (44 hours at 100%).
The Full Story
CAS 87-44-5. A bicyclic sesquiterpene with two structural rarities: a cyclobutane ring fused to a nine-membered carbocycle, and a trans-double bond inside that larger ring — a geometry so strained that E. J. Corey's 1964 total synthesis (JACS, 86:485) remains a landmark in synthetic organic chemistry. Molecular formula C₁₅H₂₄, molecular weight 204.36.
The smell is dry, woody-spicy — closer to cracked peppercorn than to kitchen spice. Warmer than limonene, less sweet than cedarwood, less smoky than guaiacol. A muted clove-like warmth sits underneath, with a faint balsamic sweetness that emerges on drydown. Tenacity is moderate: TGSC records 44 hours at 100% concentration. Boiling point 256–262°C, placing it firmly in the heart-to-base zone.
Beta-caryophyllene is a abundant sesquiterpenes in nature. Copaiba oleoresin (Copaifera spp., Brazil) delivers 50–60% BCP by GC-MS. Black pepper oil (Piper nigrum) runs 25–35%. Clove bud oil (Syzygium aromaticum) contributes 12–20%. It appears in oregano, rosemary, hops, cinnamon bark, and cannabis. Isolation is typically by fractional distillation of copaiba or clove oil, making it one of the cheapest natural sesquiterpenes available to perfumers.
One critical formulation concern: beta-caryophyllene autoxidizes readily on air exposure. Sköld et al. (Food Chem. Toxicol., 2006) showed that after five weeks of air exposure, nearly 50% of the original compound converts to caryophyllene oxide and other oxidation products. The oxidized mixture shows weak sensitization potential in the LLNA. Fresh, properly stored material has no IFRA restriction (RIFM safety assessment, 2021). Storage under nitrogen with antioxidant is standard practice.
In 2008, Jürg Gertsch and colleagues at ETH Zürich demonstrated that beta-caryophyllene selectively binds the CB2 cannabinoid receptor with a Ki of 155 nM (PNAS, 105:9099) — making it the first known dietary cannabinoid. It produces no psychoactive effect because it ignores CB1 entirely. The FDA had already classified it as GRAS (FEMA 2252) decades earlier, so it became the only molecule simultaneously approved as a food flavoring agent and recognized as a cannabinoid receptor agonist.
Extraction & Chemistry
Extraction method: Primarily isolated by fractional distillation of copaiba oleoresin (Copaifera multijuga, C. officinalis, C. reticulata — Brazilian Amazon), which contains 50–60% beta-caryophyllene. Clove bud oil (steam-distilled from Syzygium aromaticum) and black pepper oil (Piper nigrum, steam-distilled) are secondary sources at 12–20% and 25–35% respectively. The molecule's abundance in cheap, high-volume essential oils means natural isolation is often more economical than synthesis. Synthetic production is possible but rarely practiced at industrial scale for perfumery.
No restriction (RIFM safety assessment 2021). Fresh material non-sensitizing. Autoxidized material shows weak sensitization — store under nitrogen with antioxidant.
Synonyms
CARYOPHYLLENE · BETA-CARYOPHYLLENE
Physical Properties
Odor Strength
Medium
Lasting Power
44 hours at 100%
Appearance
colorless to pale yellow oily liquid
Boiling Point
256.00 to 259.00 °C. @ 760.00 mm Hg
Flash Point
200.00 °F. TCC ( 93.33 °C. )
Specific Gravity
0.89900 to 0.90800 @ 25.00 °C.
Refractive Index
1.49800 to 1.50400 @ 20.00 °C.
In Perfumery
Heart-to-base fixative and spicy modifier. Beta-caryophyllene provides the dry, woody-peppery skeleton in amber, fougère, and aromatic-spicy compositions. It anchors volatile top-note spice materials — notably cinnamic aldehyde and eugenol — extending their perceived duration without adding sweetness. In functional fragrance (soaps, detergents), it delivers affordable spicy body at high dosage. As a natural isolate from copaiba oil, it carries no IFRA restriction in fresh form, making it a practical alternative to restricted spice materials. It blends naturally with clove, black pepper, cinnamon, and nutmeg accords, and bridges woody-amber bases (vetiver, patchouli, cedarwood) to spicy hearts.
