Boswellia spp. (B. sacra, B. carterii, B. serrata)
Odor Strength
Medium
Producing Countries
Somalia, Ethiopia, Oman, Yemen
Pyramid
Base
Thin blue smoke curling off a resin tear on a charcoal disc. Dry, lemony-terpenic on top, then warm, balsamic, almost sweet — the smell of a stone nave after vespers.
The first impression is terpenic and surprisingly bright — lemon peel, pine needle, a flash of green pepper. Within minutes the resinous heart takes over: warm, sweet, slightly powdery, like heated amber without the vanillic push. The smoke is never aggressive; it is thin, blue-grey, ecclesiastical. Compared to myrrh (darker, more animalic) or benzoin (sweeter, more balsamic), olibanum sits in a drier, more mineral register. The dry-down is long, papery, faintly dusty — old prayer book left in a warm room.
Warm resinous body emerges. Incensole sweetness, powdery smoke, balsamic depth from benzoin and labdanum layers.
After a few days
After a few days
Dry, papery, faintly mineral. Residual warmth from triterpene-heavy resinoid. The smell of cold stone that was once warm.
The Full Story
Incienso is the Spanish word for incense, but in perfumery it designates a specific accord: the smell of liturgical resin burning on charcoal. The reference point is olibanum (Boswellia sacra, B. carterii), though myrrh, benzoin, and styrax often participate. The opening is sharper than most people expect — alpha-pinene and limonene give fresh, almost citrus-like brightness before the smoke arrives. The resinous body develops around incensole and incensole acetate, two diterpenes unique to Boswellia species.
The smoke quality in an incense accord comes from phenolic molecules: guaiacol, cresol derivatives, and occasionally birch tar rectified. The warm, balsamic bed underneath relies on natural resinoids or their synthetic equivalents — labdanum absolute, benzo in Siam, olibanum resinoid. Iso E Super and Cashmeran are frequently used as amplifiers, adding volume and radiance to the accord without altering its character.
Boswelli a sacr a res in yields 3–8% essential oil by steam distillati on. The oil is dominated by monoterpenes (alph a-pinene 25–70%, alph a-thujene, limonene). CO2 extracti on captures a fuller profile, retaining heavier boswellic acids lost in distillati on. The resinoid, obtained by solvent extracti on, yields approximately 60% and provides the deepest, most church-like quality — the true fixative in an incense formul a.
In 2008, researchers at Johns Hopkins University and the Hebrew University of Jerusalem identified incensole acetate — a diterpene found only in Boswellia resin — as a potent activator of TRPV3 ion channels in the brain, producing anxiolytic and antidepressant effects in mice. The study, published in The FASEB Journal, suggested that the psychoactive properties of burning frankincense may have an empirical neurochemical basis, not merely a ritualistic one.
Extraction & Chemistry
Extraction method: Not a single material but a composite accord. The primary ingredient, olibanum, exists in three forms: essential oil (steam distillation of Boswellia sacra resin, 3–8% yield, high in alpha-pinene); resinoid (solvent extraction with benzene or hexane, ~60% yield, rich in triterpenes and boswellic acids); CO2 extract (supercritical extraction, retains both volatile terpenes and non-volatile boswellic acids lost in steam distillation). Supporting materials — myrrh, benzoin, styrax — are typically used as resinoids or absolutes.
Boswellia spp. (B. sacra, B. carterii, B. serrata)
IFRA Status
No known restrictions
Synonyms
FRANKINCENSE · OLIBANUM
Physical Properties
Odor Strength
Medium
Flash Point
> 100°C
Specific Gravity
0.8700 to 0.9100 @ 20.00°C
Refractive Index
1.4800 to 1.4900 @ 20.00°C
In Perfumery
Incense functions as a heart-to-base bridge in Amber, chypre, and atmospheric compositions. Olibanum oil contributes brightness and diffusion at the top; the resinoid and CO2 extract anchor the base as true fixatives — to achieve physical fixation from olibanum resinoid alone requires concentrations of 4–6%. The accord is built from natural resins (olibanum, myrrh, benzoin) reinforced by smoky synthetics (guaiacol, birch tar rectified) and woody amplifiers (Iso E Super, Cashmeran). Its function is architectural: it creates the sensation of enclosed space, of warm air rising through stone. Indispensable in the fougère-Amber crossover and in modern atmospheric compositions that prioritize place over person.
