A waxy amber paste that must be warmed before it will pour. The scent is quiet smoke filtered through dried rose petals — no phenolic bite, no tar, just a soft, creamy haze that sits between wood and flower.
Soft smoke and dried rose petals over a creamy, almost powdery base. The smokiness is rounded and low — nothing phenolic, nothing tarry. Drier than sandalwood, less buttery, without the mineral-earth edge of vetiver. A faint violet-leaf dryness appears after thirty minutes. The impression is meditative — a low, persistent hum, not a shout.
Evolution over time
Immediately
Immediately
Gentle smoke and dried rose petals. A creamy, faintly vanillic warmth. Powdery, soft, with no sharp edges.
After a few hours
After a few hours
The tea-leaf dryness deepens. The rosy facet recedes, replaced by a quieter, more resinous smokiness. Faint balsamic undertone.
After a few days
After a few days
Powdery wood residue, clean ash. A trace of vanillic sweetness persists on fabric. Quiet and persistent.
Terroir & Maturity
Indicative 2025 wholesale prices.
The Full Story
The oil comes from Bulnesia sarmientoi, a slow-growing hardwood endemic to the Gran Chaco dry forests of Paraguay, northern Argentina, and the Bolivian lowlands. The tree is locally called palo santo — a name shared with Bursera graveolens of Ecuador and Peru, an entirely different species in a different family (Burseraceae). Bulnesia sarmientoi belongs to Zygophyllaceae and produces one of the densest commercially traded woods: specific gravity 0.92–1.10, heavy enough to sink in water. The heartwood is dark green-brown, streaked with black resin channels.
Distillation and Composition
The oil is steam-distilled from chipped heartwood and sawmill waste. At room temperature it solidifies into a pale amber to greenish-yellow waxy mass, melting between 40–50 °C — one of the few essential oils that must be gently heated before pipetting. The composition is dominated by two crystalline sesquiterpene alcohols: guaiol (CAS 489-86-1) and bulnesol, which together constitute 60–85 % of the oil depending on origin and distillation parameters. GC×GC-TOF-MS analysis has identified over 100 minor constituents including hanamyol, guaioxide, elemol, α-eudesmol, β-patchoulene, and germacrene B.
Scent Character
Warm, rounded, quietly smoky — closer to a smoldering ember than an open flame. A rose-like quality distinguishes guaiac wood from other smoky woods: not the fresh, dewy rose of geraniol, but something darker, more like dried hybrid tea roses pressed in a book. The smoke is gentle, without the phenolic harshness ofbirch tar or the campfire intensity of cade. Underneath sits a creamy, faintly vanillic sweetness and a dry, powdery finish similar to of cold tea leaves in a ceramic pot.
Regulation and Trade
Bulnesia sarmientoi was listed under CITES Appendix II in March 2010 (CoP15, Annotation #11), following a proposal by Argentina. All international trade in logs, sawn wood, and essential oil now requires CITES export permits and non-detriment findings from the exporting country — primarily Paraguay, where over 1,000 kg of oil is produced annually from the Chaco region. The oil is also restricted under the IFRA 51st Amendment due to dermal sensitization potential. These dual constraints — ecological and toxicological — have pushed some formulators toward semi-synthetic alternatives such as guaiyl acetate (CAS 134-28-1), produced by acetylation of natural guaiol. No single molecule fully replicates guaiac wood's layered character.
Guaiol — the dominant molecule in guaiac wood oil — has its structure formally named as an octahydroazulenemethanol: its carbon skeleton is built on the same fused 5-7 ring system as azulene, the blue hydrocarbon. This makes guaiol a guaiane-type sesquiterpene, a structural class that also includes chamazulene (from chamomile) and the anti-inflammatory guaiazulene used in dermatology. The wood itself is dense enough to sink in water — specific gravity up to 1.10 — making Bulnesia sarmientoi one of the heaviest commercially traded timber species on Earth.
Extraction & Chemistry
Extraction method: Steam distillation of chipped heartwood and sawmill waste from Bulnesia sarmientoi. The distillate solidifies at room temperature (melting point 40–50 °C) due to the high proportion of crystalline sesquiterpene alcohols — guaiol and bulnesol together constitute 60–85 % of the oil. The waxy mass must be gently heated before handling. Paraguay is the primary producing country; all export requires CITES Appendix II permits since March 2010 (Annotation #11). Yield data from Chaco distilleries is not publicly standardized, but annual production exceeds 1,000 kg.
Restricted under IFRA 51st Amendment (limits apply per product category due to sensitization potential). Bulnesia sarmientoi is listed under CITES Appendix II since 2010 — trade in logs, sawn wood, and essential oil requires CITES export permits.
Synonyms
Guaiacum wood, Lignum Vitae
Physical Properties
Odor Strength
Medium
Lasting Power
400 hours at 100.00%
Appearance
yellow brown solid paste
Flash Point
282.00 °F. TCC ( 138.89 °C. )
Specific Gravity
0.96000 to 0.97500 @ 25.00 °C.
Refractive Index
1.50200 to 1.50700 @ 20.00 °C.
Melting Point
40.00 to 50.00 °C. @ 760.00 mm Hg
In Perfumery
Base-note fixative. Guaiac wood's high content of guaiol and bulnesol — high-molecular-weight sesquiterpene alcohols — gives it excellent tenacity and a smooth, non-aggressive dry-down. Its primary functi on is as a blender between floral hearts and woody-ambery bases, adding a smoky-rosy transiti on without dominating. In woody-amber compositions it contributes body and persistence. In rose accords it reinforces the darker, more resinous qualities of the flower. Bridges naturally with vetiver, patchouli, iris, and sandalwood. The semi-solid consistency requires warming to 50 °C or diluti on in DPG before use. The most comm on semi-synthetic derivative is guaiyl acetate (CAS 134-28-1), obtained by acetylati on of guaiol extracted from the natural oil. It preserves the soft tea-rose and smoky character with better IFRA compliance. No single molecule replicates the full layered warmth of the natural oil.
