Pale almond-shaped tears (Siam) to dark sticky masses (Sumatra)
Odor Strength
Medium
Producing Countries
Indonesia (Sumatra), Laos, Thailand, Vietnam
Pyramid
Base
Church smoke sweetened with almond skin. A resinous warmth that is not vanilla — drier, less confected, with a benzoic acid bite at its centre and a powdery, almost liturgical trail.
Sweet-balsamic, vanillic, resinous. Siam benzoin reads as warm candle wax and almond milk with a benzaldehyde whisper — cleaner, more transparent, closer to a church interior. Sumatra benzoin is spicier: cinnamic heat, a faint styrenic edge, an undertone approaching unsweetened cocoa. Neither variety is gourmand. The sweetness is structural, not edible — closer to frankincense than to vanilla extract. Warmer than tolu balsam, less animalic than labdanum, less green than elemi.
Evolution over time
Immediately
Immediately
Sweet, warm, balsamic-vanillic burst with an almond-skin dryness. A faint benzaldehyde sharpness — almost cherry-pit — that dissipates within minutes. Sumatra grades show an immediate cinnamic bite absent from Siam.
After a few hours
After a few hours
The vanillic warmth deepens and broadens. Powdery, resinous, enveloping. Siam benzoin becomes almost purely candle-wax sweet. Sumatra shows its cinnamic spice — a darker, slightly smoky warmth with a styrenic edge.
After a few days
After a few days
Tenacious sweet-balsamic residue. Benzoin is among the most persistent base materials — easily 12–24 hours on skin, significantly longer on fabric. The final trace is a soft, powdery vanilla-resin warmth. At this stage, the two varieties become difficult to distinguish.
Grades & Aging
Indicative 2025 wholesale prices.
The Full Story
Two trees, two resins, one name. Siam benzoin (Styrax tonkinensis, CAS 9000-72-0) — tapped in Laos, Vietnam, Cambodia — is the purer grade: 65–75% coniferyl benzoate, with p-coumaryl benzoate (10–15%), free benzoic acid (~12%), siaresinolic acid (~6%), and roughly 1% vanillin. Transparent sweetness, an almond-skin cleanness. Sumatra benzoin (Styrax benzoin and S. paralleloneurus, CAS 9000-05-9) — from the volcanic andosol highlands around Lake Toba in North Sumatra — is rougher, darker. Cinnamic acid esters dominate: p-coumaryl cinnamate and coniferyl cinnamate are the two major constituents, alongside benzyl cinnamate, free cinnamic acid, sumaresinolic acid, and less vanillin. The two materials smell related but not identical.
Siam benzoin on a strip: melted beeswax, warm almond milk, a faint benzaldehyde catch — almost cherry-pit — that fades into a soft vanillic haze. Sumatra benzoin: the sweetness has teeth. Cinnamic spice, a styrenic sharpness, something between dark chocolate and smouldering wood. Both are drier than vanilla absolute, less medicinal than Peru balsam, less camphoraceous than frankincense. The sweetness registers in the chest, not on the tongue.
Collection follows the same ancient method for both varieties. Mature Styrax trees — six to ten years old — are scored with diagonal incisions through the bark. The exudate seeps, hardens in situ over four to six months, then is collected by hand. Siam benzoin yields pale, brittle almond-shaped tears with a milky fracture — the premium grade for tincture. Sumatra benzoin hardens into darker, stickier masses with more botanical debris. Laos dominates Siam production: roughly 50 tonnes annually, from styrax forests above 700 m in Luang Prabang, Phong Saly, and Houaphan provinces. Sumatra benzoin output from the Tapanuli region is far larger — estimates range from 1,000 to several thousand tonnes per year, depending on grade classification.
The chemical architecture explains the olfactory split. Siam benzoin's high coniferyl benzoate content (modern HPLC analyses place it at 65–75%) delivers a clean, balsamic-vanillic signature. Sumatra benzoin's cinnamic acid esters — plus sumaresinolic acid triterpenoids — add resinous complexity and spice. Both contain free benzoic acid (the compound first isolated from this very resin in the sixteenth century) and trace vanillin, but in markedly different proportions.
This Note in Première Peau. In Nuit Elastique, benzoin provides the resinous, slightly sweet foundation that anchors the jasmine-leather structure — present as warmth rather than as a discernible note, holding the composition's indolic tension in place.
Benzoin resin warms the base of Simili Mirage, bridging birch-tar leather and maquis shrub with its vanillic, balsamic sweetness.
Nostradamus — physician and apothecary before he became a prophet — published the first known description of dry-distilling gum benzoin in his Traité des fardements et confitures (first edition 1555, Lyon). The acidic crystals that sublimed from the heated resin were later characterised by Alexius Pedemontanus (1560) and named by Blaise de Vigenère (1596). That compound — benzoic acid — is now manufactured synthetically at several hundred thousand tonnes per year worldwide and used as food preservative E210. A molecule first observed rising from perfume resin in a Renaissance apothecary now sits in most commercial soft drinks.
Extraction & Chemistry
Extraction method: Mature Styrax trees (6–10 years old) are scored with diagonal incisions through the bark. The balsamic exudate seeps out and hardens in situ over 4–6 months before manual collection. Siam benzoin yields pale, brittle almond-shaped tears with a milky fracture — the highest grade. Sumatra benzoin hardens into darker, stickier masses with more botanical debris. For perfumery use: solvent extraction (typically ethanol wash) produces a dark, viscous resinoid, pourable when warmed. Traditional tincture preparation dissolves 50–70% resin in ethanol. Supercritical CO₂ extraction yields a cleaner product with reduced solvent residue. Siam benzoin production centres on Luang Prabang province in Laos (~50 tonnes/year). Sumatra benzoin comes from the Tapanuli highlands of North Sumatra, with output estimated at 1,000+ tonnes annually. A mature tree produces approximately 0.5 kg of crude resin per year over a productive lifespan of 15–20 years.
No direct IFRA standard on benzoin resin itself. Use limits are determined by constituent concentrations — principally benzyl benzoate and benzyl cinnamate — which carry category-specific restrictions under the IFRA 51st Amendment (2023).
Synonyms
benzoin resin, gum benzoin
Physical Properties
Odor Strength
Medium
Lasting Power
Very high (12–24 hours on skin, 48+ hours on fabric)
Appearance
Pale almond-shaped tears (Siam) to dark sticky masses (Sumatra)
In Perfumery
Base-note fixative and balsamic sweetener. Benzoin anchors volatile top and heart notes by slowing their evaporation rate, while layering warm, resinous sweetness into the dry-down. It is a structural pillar of the classical amber accord — the triad of labdanum, benzoin, and vanillin that underpins the amber (ambrée) family. Benzoin tincture (resin dissolved at 50–70% in ethanol) remains one of the oldest fixative preparations still in active use. The resinoid, obtained by solvent extraction, is the modern standard; supercritical CO₂ extraction produces a cleaner variant with less residual solvent. Functionally, benzoin smooths abrupt transitions between fragrance phases, softens sharp aldehydic or citrus openings, and adds powdery volume to floral hearts without introducing animalic weight. It is a blender and volume builder in chypre, fougère, and gourmand compositions alike. In Première Peau’s NUIT ELASTIQUE (/products/nuit-elastique-jasmine-night-perfume), Siam benzoin resinoid forms part of the tenacious base alongside cedar, hay, and sandalwood, anchoring the elaborate jasmine-rose heart. In SIMILI MIRAGE (/products/simili-mirage-leather-salty-maquis-perfume), Sumatra benzoin resinoid underpins the leather-thyme architecture with darker, spicier balsamic warmth.
