A material whose classical source was effectively used up, and which the industry rebuilt through plantations and five synthetic molecules.
Definition
Sandalwood oil is steam-distilled from the heartwood and roots of Santalum trees, principally Santalum album, the Indian or East Indian species. The odour is carried by santalols — alpha- and beta-santalol together make up roughly ninety per cent of good album oil, and the beta isomer is the more valuable of the two.
Only mature trees are worth distilling. Heartwood develops slowly and oil content rises with age, which is why the traditional Indian material came from trees of thirty years and upward, and why the supply problem is structural rather than cyclical.
Olfactory character
Soft, creamy, milky-woody, with a lactonic sweetness and a faint balsamic warmth. It has almost no top note and very little projection; its value lies in body, smoothness and persistence. Perfumers describe it as rounding — it blends edges rather than adding a feature.
Species differ audibly. S. album is the creamiest and sweetest and remains the reference. Australian S. spicatum is drier, greener and slightly resinous, with lower santalol content. Plantation album from northern Australia sits close to Indian material and now supplies most of the legitimate high-grade market. New Caledonian S. austrocaledonicum is a recognised third profile.
Historical development
Sandalwood has been used in India as incense, in carving, in Ayurvedic medicine and in ritual for more than two thousand years, and it reached European perfumery through the colonial trade. Mysore state material became the industry benchmark, distilled under government control from the early twentieth century, and “Mysore sandalwood” survives as a phrase long after the supply behind it did.
Guerlain Samsara (1989) is the usual citation for the classical material at high dosage, and stands roughly at the point where the wild Indian supply became untenable. Decades of illegal felling, slow regrowth and state monopoly pricing had reduced legitimate availability sharply.
Two responses followed. Plantation cultivation of S. album in the Kimberley region of Western Australia was established from the 1990s and now yields at commercial scale. In parallel the sandalwood synthetics — Sandalore (1974), Polysantol, Ebanol, Javanol (1996) — took over the bulk of the effect in mass-market perfumery. Javanol in particular is extraordinarily powerful and is now more common in a supermarket fragrance than any distilled sandalwood.
Materials
Santalum album oil (CAS 8006-87-9), steam-distilled from heartwood and roots, 90% santalols; S. spicatum (CAS 8024-35-9), Australian, drier and lower in santalol; S. austrocaledonicum from New Caledonia and Vanuatu. Also traded as heartwood powder and chips for incense, and as CO2 extract. “Amyris” (Amyris balsamifera) and Australian buddha wood are cheaper adjacent materials, sometimes misdescribed as sandalwood.
Sandalore (Givaudan, 1974) is the workhorse; Polysantol (Firmenich) is sweeter and more powerful; Ebanol (Givaudan) closer to the milky facet; Javanol (Givaudan, 1996) is the most substantive, with an exceptionally low odour threshold. None reproduces album oil alone — modern santal accords blend two or three with lactones and coconut lactone type materials for creaminess.
A useful working position: synthetics deliver the effect at volume and price, plantation album delivers the reference smell, and the two are usually combined.
Grading and quality
Species and santalol content are the two numbers that matter. Reputable album oil is sold with a gas-chromatographic assay stating alpha- and beta-santalol; the ISO standard for East Indian sandalwood oil sets minimum santalol content, and material substantially below it is either a different species or adulterated.
Adulteration is common and long-standing, typically with amyris, castor oil, polyethylene glycol, or with santalol-poor fractions of related species. Provenance claims deserve scrutiny in the other direction too: given the state of wild Indian supply, oil offered as Mysore in commercial quantity is best treated as a claim about style rather than origin. Plantation Australian album with a documented harvest year is the ordinary answer for high-grade material.
Sourcing and sustainability
Santalum album is assessed as vulnerable on the IUCN Red List. In India the tree has long been subject to state ownership and control of felling, and export of the oil has been restricted; illegal harvesting of wild and village trees was substantial through the late twentieth century.
The species is a root hemiparasite: it needs a host plant to establish, which for a long time was taken as a reason plantation cultivation would not work. The Western Australian plantings disproved that, and cultivated album — grown to roughly fifteen years rather than thirty — is now the largest source of legitimate high-santalol oil. S. spicatum is harvested both wild and from plantation in Western Australia under state regulation.
Sandalwood is therefore the wedge’s success story, in a narrow sense: a material that was being exhausted, brought back into supply by cultivation, with synthetics absorbing the volume that cultivation could not. What has not returned is the specific character of old-growth Mysore heartwood.
Safety and regulation
Common accords
Fragrance families
Sandalwood is definitional to the woody-oriental and load-bearing in the classical floral-woody. Because it adds smoothness more than character, it appears across chypre, fougère and gourmand structures as a base material without being read as a note. In Indian and Middle Eastern perfumery traditions it is a foreground material in its own right.
Examples
Guerlain Samsara (1989) is the standard citation for sandalwood at high dosage. Chanel Bois des Îles (1926) is the classical aldehydic-woody treatment, and Diptyque Tam Dao (2003) the well-known modern soliflore reading.
Le Labo Santal 33 (2011) is the reference for the synthetic-forward version of the accord, and demonstrates how far the effect can be taken with Javanol-class molecules. Any pre-1990 formula named for sandalwood should be assumed to use different material in its current version.
Historical terminology
“East Indian sandalwood” means S. album; “West Indian sandalwood” is amyris, a different genus entirely. Chandan is the Sanskrit and Hindi name, santal the French. “Mysore” denotes a historical grade and region rather than a current supply. Australian sandalwood may mean either plantation album or wild spicatum, which are not interchangeable — ask which.