Fragrant rosewood

Other Names

Aniba duckeiAniba duckei Kosterm.Aniba rosaeodoraAniba rosaeodora DuckeAniba rosaeodora var. amazonicaAniba rosiodora var. amazonicaAniba rosodoraAniba rosodora DuckeBois de RoseBrazilian rosewoodChinese rosewoodDalbergia changhuagensisDalbergia odoriferaDalbergia odorifera T.C. ChenHainan DalbergiaHainan HuanghualiHualiHualunHuanghua li (黄花梨)HuanghualiJiang XiangJiangxiangJiangXiang (降香)KangjinhyangKoshinkoLignum Dalbergiae OdoriferaeLouro pauPalo de RosaPau-RosaRed silverballiRosewood TreeXiangmu

Synopsis

Fragrant Rosewood (Aniba rosaeodora Ducke): A Comprehensive Reference

1. Identity: Botanical Classification, Names, and Natural Source

1.1 Nomenclature and Taxonomy

Aniba rosaeodora Ducke, commonly known as pau-rosa (Portuguese for "pink wood"), is a species of Magnoliid tree in the family Lauraceae that grows in parts of the tropical rainforest of South America. The taxon was formally described by the botanist Adolpho Ducke, with the scientific name published in 1928. The common English name "fragrant rosewood" — as well as "rosewood," "bois de rose" (French), and "Brazilian rosewood" — is applied to this species, though the nomenclature warrants a critical clarification: A. rosaeodora is often mistaken for rosewood but does not belong to the proper rosewood genus, Dalbergia, or even its order.

Taxonomic revisions have at various times treated A. rosaeodora var. amazonica Ducke as a distinct taxon; later it was raised to species level as Aniba duckei Kostermans in 1938, but a subsequent review of the Aniba genus proposed that A. duckei Kosterm. and A. rosaeodora var. amazonica Ducke were synonymous with A. rosaeodora Ducke (1930). A second plant source, Aniba parviflora (Meiss.) Mez, is also called rosewood and is distributed across all Amazon regions, including Brazil, Guyana, Suriname, Peru, Colombia, and Venezuela.

1.2 Morphology and Native Habitat

The tree is massive, up to 30 meters in height and 2 meters in diameter, and evergreen; the entire tree is fragrant, and its tissues contain linalool and rubranine. Aniba rosaeodora Ducke, Lauraceae, is a large tree with yellow-brown bark (hence the common name rosewood) that grows in the Amazon region. It is found in the Brazilian states of Amapá, Amazonas, and Pará, and also in Colombia, Ecuador, Guyana, Peru, Suriname, Venezuela, and French Guiana, where it was formerly more widespread. The flowers are perfect, with temporal dioecy, and the fruit is a purple drupe dispersed by toucans.

1.3 Common Forms and Preparations

Rosewood oil is a colorless to pale yellow liquid with a woody floral fragrance, containing the monoterpenic alcohol linalool as its main constituent. Rosewood oil has a characteristic aroma and is a long-established ingredient used in fragrances and food products, presenting a balanced bouquet of floral, sweet, woody, and citric odors.

The principal preparative form is the essential oil, obtained by steam or hydrodistillation. After felling, trees are cut into one-meter long logs taken to the riverbank and stockpiled; when river levels are high enough, the logs are floated downriver to a distillery. Because of the remoteness and difficulty of travel in the Amazon, distilleries are often mobile and movable by raft. When they arrive at the distillery, the logs are chipped and then steam distilled, and each tree yields about 1% oil by weight of wood. All parts of the tree are fragrant, although only the trunk wood is harvested and hydrodistilled to obtain rosewood oil.

Research has explored alternative sustainable sources. An alternative to trunk harvesting is to trim the leaves of young plants and steam-distill them to obtain essential oil; four-year-old plant material has been shown to provide oil that could be an economical source and eventually a replacement for wood oil in perfumery. The rosewood oil yield from commercial exploitation in the Amazon region, sold to the international market, ranges from 0.7% to 1.2%.

Several medicinal uses have been reported, and rosewood oil and its principal constituent linalool have also been employed in most major food categories, such as soft drinks, alcoholic beverages, and confectionery.

2. Traditional and Historical Use

2.1 Indigenous Amazonian Use

Native to the Amazon Basin, rosewood (Aniba rosaeodora) has a rich and lengthy history connecting with both local customs and international trade; for generations, people have valued the tree's aromatic wood, leaves, and essential oil for their cultural, therapeutic, and economic benefits. For indigenous peoples of the Amazon, particularly the Shipibo-Conibo of the Peruvian Amazon, rosewood has been a crucial part of their relationship with the natural world; the tree was valued not only for its aromatic qualities but also for its medicinal and spiritual significance. The bark and wood were used to create decoctions for treating ailments such as headaches, muscle pain, infections, and depression.

The species has been used in the Amazon as a medicinal plant to control epileptic seizures, to compose regional fragrances, and as an ornamental plant. The essential oils of the leaves of Aniba rosaeodora (pau-rosa), Aniba parviflora (macacaporanga), and Aeollanthus suaveolens (catinga-de-mulata), rich in linalool, are used in the traditional medicine of the Brazilian Amazon for their effects on the central nervous system, such as sedative, anticonvulsant, and antidepressant properties, among other therapeutic uses.

The wood of A. rosaeodora may also be utilized by indigenous peoples of the Amazon basin for making canoes, though this is a minor use.

2.2 Industrial and Commercial History

Rosewood essential oil is widely used in the perfumery industry, and its extraction for industrial purposes began in the interior of the state of Pará, Brazil, around 1930. Brazilian rosewood (Aniba rosaeodora Ducke) has historically been subject to unsustainable exploitation to obtain linalool-rich essential oil from its timber; the essential oil is used as a fragrance ingredient in fine perfumes and as a fixative, and linalool is also a precursor of several highly valuable compounds for the perfume and fragrance industry. Most worldwide production comes from Brazil; since the 1960s, other areas produce only a minor, insignificant amount.

3. Key Constituents and Active Compounds

3.1 Primary Volatile Constituents

The major volatile compound found in rosewood oil is linalool, ranging from 78 to 93%, although percentages of up to 99% have been reported. A 2021 study published in Antibiotics (MDPI) reported linalool as the major constituent at 93.60%, with α-terpinolene and linalool cis-oxide identified and quantified at 3.37% and 3.03%, respectively. A separate analysis cited typical ranges of: linalool 82.3–90.3%; α-terpineol 0.5–5.4%; (Z)-linalool oxide approximately 1.5%; (E)-linalool oxide approximately 1.3%; and 1,8-cineole 0.2–2.3%.

Additional minor compounds have been identified. The main compound classes include benzenoids and phenylpropanoids, represented by 1-nitro-2-phenylethane, benzyl salicylate, benzyl benzoate, and methyleugenol, along with terpenoids, especially monoterpenes and sesquiterpenes such as linalool, α-phellandrene, β-phellandrene, β-selinene, and spathulenol.

3.2 Chemical Variability

Essential oils from Aniba show considerable variation in chemical profiles according to season and collection site. In some population samples (e.g., RESEX reserve), the abundance of linalool was only 39.6%, followed by α-phellandrene at 22.8%, which was absent in other (FLONA) samples. The species occurs mainly in northern South America, and the morphological similarity among different Aniba species often leads to misidentification, which impacts the consistency of products obtained from these plants.

3.3 Linalool: Stereochemistry and Primary Constituent

Rosewood oil (Aniba rosaeodora Ducke) is rich in linalool, a monoterpene alcohol, which has well-studied anxiolytic, sedative, and anticonvulsant effects. The (−)-linalool enantiomer (also written as (R)-(−)-linalool or (S)-(+)-linalool depending on the nomenclature system) is predominant in the essential oil extracted from the wood, as opposed to the leaves, and gives the oil its signature sweet, floral, and woody aroma. Additional substances identified in the tree include linalool and rubranine.

Within the Aniba genus, species are grouped according to their dominant chemistry. A. duckei and A. rosaeodora are placed in Group I (linalool-dominant species), distinguishing them from other Aniba species dominated by benzyl benzoate or alkylbenzene compounds.

4. Mechanisms of Action

4.1 Central Nervous System: GABAergic and cAMP Pathways

There are pieces of evidence for linalool's potential anxiolytic action. In a study, linalool inhalation induced a significant anxiolytic-type effect in mice using classic behavioral tests. There was no effect in anosmic mice, indicating that the effect occurs through the olfactory input of linalool. The anxiolytic-type effects of linalool were antagonized by flumazenil, demonstrating interaction with GABAergic transmission.

Rosewood oil, (−)-linalool, and (±)-linalool inhibited the cAMP accumulation stimulated by forskolin, even when adenosine receptors were blocked with IBMX. The IC50 values calculated from their concentration-response curves were not statistically different, though the compounds presented different relative efficacy. These results extend the range of subcellular mechanisms underlying the relaxant action of linalool on the central nervous system.

According to Brum et al., the direct interaction with NMDA receptors constitutes the mechanism of anticonvulsant action elicited by linalool. Anticonvulsant activity of enantiomers and the racemic mixture of linalool has been demonstrated through the pentylenetetrazole- and picrotoxin-induced challenge in mice, and linalool also showed anticonvulsant activity in glutamate-related seizure models.

4.2 Antimicrobial Mechanisms

Linalool stands out as the substance with the highest concentration in the essential oil; however, it is not yet known whether this compound is the single main active component of the oil's antimicrobial activity. Both methodologies (disc diffusion and MIC analysis) showed that A. rosaeodora essential oil presented better antimicrobial activity overall than isolated linalool across all strains analyzed, suggesting synergistic contributions from minor components.

4.3 Pro-apoptotic / Cytotoxic Mechanisms in Cancer Cells

In epidermoid cancer cell studies, REO (rosewood essential oil) triggered the production of reactive oxygen species, induced depolarization of the mitochondrial membrane, and caused caspase-dependent cell death characterized by phosphatidylserine externalization, an early marker of apoptosis. Both intrinsic and extrinsic apoptotic pathways were implicated in REO-induced cell death.

4.4 Antioxidant Mechanisms

An efficient antioxidant activity of A. rosaeodora essential oil and linalool (EC50: 15.46 and 6.78 µg/mL, respectively) was demonstrated through inhibition of the ABTS radical.

5. Scientific Evidence by Area of Use

Important framing note: As of the available literature, virtually all pharmacological and biological activity studies on A. rosaeodora essential oil are pre-clinical — conducted in vitro (cell cultures) or in vivo in rodents. No published randomized controlled trials in human subjects were identified for any therapeutic indication specific to this oil. The evidence base is therefore preliminary and cannot be extrapolated directly to clinical recommendations.

5.1 Central Nervous System: Sedation, Anxiolysis, and Antidepressant-Type Effects

Traditional basis: The essential oils of the leaves of Aniba rosaeodora (pau-rosa), Aniba parviflora (macacaporanga), and Aeollanthus suaveolens (catinga-de-mulata), rich in linalool, are used in traditional medicine of the Brazilian Amazon for effects on the central nervous system, including sedative, anticonvulsant, and antidepressant properties.

Pre-clinical evidence — sedation: In a mouse model, inhaled linalool produced sedative effects, eliciting hypothermia, reducing locomotion, and increasing sleep time induced by pentobarbital. The linalool-rich rosewood (Aniba rosaeodora Ducke) essential oil also elicited a sedative effect and depressed the excitability of the sciatic nerve of mice.

Pre-clinical evidence — antidepressant-type effects: A 2017 rodent study (published in Journal of Ethnopharmacology, PMID 29037915) evaluated linalool-rich essential oils from three Amazonian species. Male Wistar rats received intraperitoneal doses of pau-rosa oil (3.5 and 35 mg/kg), macacaporanga (8.5 and 85 mg/kg), and catinga-de-mulata (7.5 and 75 mg/kg), in addition to a linalool standard (30 mg/kg); neurobehavioral effects were evaluated using the Open Field (spontaneous locomotion), Elevated Plus Maze (anxiolytic-type activity), and Splash and Forced Swimming (antidepressive-type activity) tests.

Pre-clinical evidence — neuroprotection in adolescent binge-drinking model: A 2024 PubMed-indexed study (PMID 39024836) used adolescent female Wistar rats exposed to ethanol binge-drinking. Adolescent female Wistar rats received four cycles of ethanol binge-like pattern (3 g/kg/day, 3 days on/4 days off) and daily rosewood oil (35 mg/kg, intranasally) for 28 days; the impact of ethanol exposure and rosewood oil treatment on emotional impairments was then assessed via the Splash and Forced Swimming tests.

Evidence strength: All data are pre-clinical (rodent models). Evidence of linalool activity on the central nervous system, mainly acting as an antidepressant agent, is increasingly abundant, and linalool is the main constituent of some essential oils from aromatic plants, representing about 70% of these volatile concentrates. Nonetheless, no human clinical trials exist; evidence remains at the animal/mechanistic stage.

5.2 Anticonvulsant / Antiepileptic Activity

The species has been used in the Amazon as a medicinal plant to control epileptic seizures. At the mechanistic level, linalool-rich rosewood oil, (−)-linalool, and its racemate inhibited the activity of adenylate cyclase in the retina of chicks, preventing cellular accumulation of cyclic AMP (cAMP), which has been implicated in the pathophysiology of epilepsy. Rosewood oil is rich in linalool, a monoterpene alcohol with well-studied anticonvulsant effects; inhibition of increases in cAMP protects against seizures in a diversity of models of epilepsy. These results are entirely from in vitro (chick retina) and rodent models; no human trials have been conducted.

5.3 Antimicrobial Activity

Antibacterial: The A. rosaeodora essential oil and linalool showed activity against all bacterial strains tested, including standard strains and marine environment bacteria, with the lowest minimum inhibitory concentration (MIC) observed for S. aureus. A 2024 integrative review (PRISMA-method, screening 134 articles and selecting 17 for analysis) reported that the EO of Aniba rosaeodora revealed mainly antibacterial, antifungal, antiparasitic, and antiviral properties. Rosewood oil, alongside oils from Thymus vulgaris, Syzygium aromaticum, Pimenta dioica, and others, exhibited strong antibacterial activity; GC-MS analysis identified linalool, limonene, and α-terpineol as constituents linked to moderate antibacterial activity.

Evidence strength: Exclusively in vitro. The EO of Aniba rosaeodora showed potential biopharmacological and microbiological activities in pre-clinical models; linalool stood out as the substance with the highest concentration, but it is not yet known whether this compound is the main active component. More studies should be conducted to support and describe the pharmacological potential.

5.4 Antioxidant Activity

An efficient antioxidant activity of A. rosaeodora essential oil and linalool (EC50: 15.46 and 6.78 µg/mL, respectively) was demonstrated by inhibition of the ABTS radical, indicating concentration-dependent free radical scavenging in vitro. These findings are in vitro only; no human clinical data exist.

5.5 Antiparasitic Activity (Trypanocidal)

The antitrypanosomal activity of A. rosaeodora essential oil and linalool was observed at high concentrations against epimastigote forms (IC50: 150.5 ± 1.08 and 198.6 ± 1.12 µg/mL, respectively), and even higher concentrations were required against intracellular amastigotes of T. cruzi (IC50: 911.6 ± 1.15 and 249.6 ± 1.18 µg/mL, respectively). Both A. rosaeodora essential oil and linalool did not exhibit a cytotoxic effect in BALB/c peritoneal macrophages, and both reduced nitrite levels in unstimulated cells, revealing a potential effect on nitric oxide production. The IC50 values against trypanosomes are substantially higher than those for the reference drug benznidazole, limiting immediate therapeutic interpretation. This is purely pre-clinical in vitro data.

5.6 Anticancer / Cytotoxic Activity

A 2011 in vitro study (published in Mutation Research, PMID 21070863) investigated rosewood essential oil (REO) against human skin cell lines. Effects were investigated on the human epidermoid carcinoma cell line A431, immortal HaCaT cells representing an early stage of skin carcinogenesis, transformed normal HEK001 keratinocytes, and primary normal NHEK keratinocytes. In a defined range of concentrations, REO selectively killed A431 and HaCaT cells, while the same treatments had only a minor cytotoxic effect on HEK001 and NHEK (normal) cells. The identification of selective induction of apoptosis in precancerous and cancerous skin cells by REO highlights the potential anticancer activity of this essential oil.

Evidence strength: In vitro only. No animal models or human clinical data on anticancer activity are available.

5.7 Cardiovascular Effects

A 2014 study (published in Phytotherapy Research, PMID 23447129) investigated cardiovascular effects in normotensive rats. Cardiovascular effects of the linalool-rich essential oil of Aniba rosaeodora in normotensive rats were investigated; in anesthetized rats, intravenous injection of the oil induced dose-dependent biphasic hypotension and bradycardia. Emphasis was given to the first phase — which is rapid (onset time of 1–3 seconds) — and was not observed in animals submitted to bilateral vagotomy or selective blockade of neural conduction of vagal C-fibre afferents by perineural treatment with capsaicin. This study is purely animal-based (normotensive rat model); no human cardiovascular trials exist.

6. Body Systems and Health Areas Associated with A. rosaeodora

Central Nervous System: Several pieces of evidence point to anticonvulsant, sedative, and anxiolytic actions of linalool, the oil's dominant constituent, based on pre-clinical models.
Mood and Neuropsychology: Evidence suggests that linalool exerts antidepressant and anxiolytic effects, documented in rodent behavioral pharmacology studies.
Infectious Disease (Antimicrobial): In vitro activity has been demonstrated against bacteria (notably S. aureus), fungi, and parasites (Trypanosoma cruzi).
Dermatology / Skin Biology: In vitro selective cytotoxicity toward epidermoid carcinoma cells and precancerous keratinocytes has been reported, alongside its long-standing use in cosmetic and perfumery skin applications.
Cardiovascular System: Animal-model studies show dose-dependent hypotensive and bradycardic reflex effects mediated via vagal C-fibres.
Oxidative Stress: In vitro antioxidant (ABTS radical scavenging) activity has been quantified for both the whole oil and isolated linalool.

7. Dosage Forms and Dosages Reported in Studies

No standardized human clinical dosages have been established for A. rosaeodora essential oil in any therapeutic indication. The following dosages appear in pre-clinical research only and are reported here strictly as found in those sources:

In the 2017 antidepressant-type rodent study, male Wistar rats received intraperitoneal doses of the pau-rosa oil at 3.5 mg/kg and 35 mg/kg, alongside a linalool standard at 30 mg/kg.
In the 2024 adolescent binge-drinking rat model, daily rosewood oil was administered intranasally at 35 mg/kg for 28 days.
Antitrypanosomal activity against epimastigote forms was observed with IC50 values of 150.5 ± 1.08 µg/mL for the essential oil and 198.6 ± 1.12 µg/mL for isolated linalool; IC50 against intracellular amastigotes was 911.6 ± 1.15 µg/mL (essential oil) and 249.6 ± 1.18 µg/mL (linalool) in in vitro assays.
Antioxidant EC50 values in the ABTS assay were 15.46 µg/mL for the essential oil and 6.78 µg/mL for linalool in vitro.

All dosage forms in the literature reviewed are either intraperitoneal injection, intravenous injection, inhalation, or intranasal administration in animal models. No oral or topical human dosage regimen has been established in peer-reviewed sources.

8. Safety Considerations

8.1 Skin Sensitization from Oxidized Linalool

Oxidized linalool, containing mainly hydroperoxides of linalool, was found to be a potential skin sensitizer; linalool hydroperoxides are formed by air exposure and are among the common oxidized fragrance terpenes. Increasing trends of oxidized linalool contact allergy have been reported in the dermatological literature. This is particularly relevant for topical cosmetic or aromatherapy preparations that may have been stored improperly or exposed to oxygen.

8.2 Regulatory Allergen Declaration

The EU Cosmetics Regulation requires on-label declaration of 26 fragrance allergens, including linalool and limonene, when present above defined thresholds in finished products. Because rosewood oil is predominantly linalool, any cosmetic formulation using it is directly subject to this EU requirement. Many essential oils contain naturally occurring compounds that are subject to fragrance allergen restrictions and concentration limits.

8.3 In Vitro Cytotoxicity Findings

Cytotoxicity assay revealed that A. rosaeodora essential oil and linalool did not show toxicity for BALB/c peritoneal macrophages even at the highest concentration analyzed (1,000 µg/mL). While this is a positive initial safety signal at the cellular level, it does not constitute a human safety profile.

8.4 Pre-clinical Anesthetic and CNS Depressant Effects

In two pre-clinical studies, anesthetic effects of the A. rosaeodora EO were observed, without observation of serious adverse events or deaths, but the specific active compound was not identified. The documented sedative and CNS-depressant properties of linalool raise theoretical concerns about additive effects with CNS-depressant drugs, though no human interaction studies have been conducted.

8.5 Conservation Status and Adulteration

A. rosaeodora is IUCN Red Listed as an Endangered species (Barstow, 2021) and is trade-protected by the Convention on International Trade in Endangered Species (CITES). Although levels of exploitation have declined with the increased use of synthetic linalool, this has not been sufficient to prevent the unsustainable and illegal harvesting of the rosewood tree or the illegal production and trade of its essential oil.

Rosewood essential oil is frequently adulterated for many reasons, including that it is among the most commercially valuable essential oils. Oil adulteration with synthetic linalool or oils from other species is a documented commercial problem, which has direct implications for both therapeutic quality and conservation impact of purchased preparations.

The wood and essential oil of Aniba rosaeodora are listed on Appendix II of CITES. According to the IUCN, the conservation status of the tree is endangered and "populations throughout the species range have seriously declined because of rosewood oil extraction; where there has been exploitation, populations are devoid of mature trees and significant signs of regeneration are absent."

References

Health Conditions

Health conditions that Fragrant rosewood may help support.

No conditions available.

Body Systems

Body systems that Fragrant rosewood may help support.

No body systems available.