Beta-pinene

Other Names

(1S)-(-)-β-Pinene(1S,5S)-2(10)-Pinene(1S,5S)-6,6-Dimethyl-2-methylenebicyclo[3.1.1]heptane(1S,5S)-Pin-2(10)-ene(1S,5S)-β-Pinene2(10)-Pinene2,2,6-Trimethylbicyclo[3.1.1]hept-2-ene2,6-Trimethylbicyclo[3.1.1]hept-2-ene6,6-Dimethyl-2-methylene-bicyclo[3.1.1]heptane6,6-Dimethyl-2-methylenebicyclo[3.1.1]heptane6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane6,6-dimethyl-4-methylidenebicyclo[3.1.1]heptaneBicyclo[3.1.1]heptane, 6,6-dimethyl-2-methylene-Bicyclo[3.1.1]heptane, 6,6-dimethyl-2-methylene-, (1S)-Bicyclo[3.1.1]heptane, 6,6-dimethyl-2-methylene-, (1S,5S)-Bicyclo[3.1.1]heptane-6,6-trimethyl, 2-methyleneL-β-Pinenelaevo-β-PineneNopinenNopinenePin-2(10)-enePinenePINENE BETAPinene, βPseudopinenPseudopineneTerbentheneTerebentheneβ-Pineneβ-Pinene [1R-(+), 1S-(-)]

Synopsis

β-Pinene (Beta-Pinene): A Comprehensive Reference

1. Identity: Chemical Names, Structure, and Physical Properties

β-Pinene is a monoterpene, an organic compound found in plants. Its systematic IUPAC name is 6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane, and it is also known as 2(10)-Pinene, Nopinene, and Pseudopinene. Additional synonyms include Beta-nopinene and Terbenthene. The compound's CAS registry number is 127-91-3. Both alpha- and beta-pinene represent bicyclic compounds, meaning that they possess two rings in their structures. The structural distinction between the two isomers is defined by double-bond position: alpha-pinene is characterized by the presence of a double bond within the ring structure, whereas beta-pinene possesses a double bond outside of the ring structure.

Beta-pinene is the less abundant of the two isomers of pinene, the other being α-pinene. It is a colorless liquid soluble in alcohol but not water. It has a woody-green pine-like smell. Optically active and racemic β-pinenes are present in turpentine oils, although in smaller quantities than α-pinene. The compound exists as two enantiomers: (+)-β-Pinene, i.e., (1R,5R)-6,6-dimethyl-2-methylenebicyclo(3.1.1)heptane, and (−)-β-Pinene, i.e., (1S,5S)-6,6-dimethyl-2-methylenebicyclo(3.1.1)heptane. The enantiomers differ meaningfully in biological activity, a distinction with significant pharmacological consequences (discussed in later sections).

When oxidized in air, the allylic products of the pinocarveol and myrtenol family prevail. On an industrial scale, pyrolytic cleavage to myrcene, the starting material for acyclic terpenes, is used. Addition of formaldehyde results in the formation of nopol; nopyl acetate is used as a fragrance material.

β-Pinene itself was first identified in 1896 by noted German chemist Adolf von Baeyer in an extensive paper on the origins of terpenes. Naturally occurring cyclobutanes have been known since the 1890s with the isolation of α- and β-pinenes, followed by caryophyllene a few years later. A large number of derivatives of these were isolated in the years to come.

2. Natural Sources and Distribution

α- and β-Pinene are mainly produced by pine trees and many other conifers, as well as a wide range of herbs such as rosemary, parsley, basil, and even orange peel. β-Pinene is one of the most abundant compounds released by trees. It appears broadly across the plant kingdom: β-Pinene is present in citrus raw materials (lemon essential oil, bergamot essential oil, sweet orange essential oil), in spices (black pepper essential oil, elemi essential oil, nutmeg essential oil), in galbanum essential oil, and in turpentine essential oil. ChemicalBook data indicate that β-pinene is reported found in over 190 natural products including apple, apricot, many citrus juices and peel oils, bilberry, cranberry, lingonberry, blackberry, currants, guava, raspberry, and strawberry.

Beta-pinene and alpha-pinene are found naturally in the turpentine oil of pine trees. According to the different species of Pinus, there is a difference in the contents of beta-pinene. Concentrations vary depending on the source and seem to be higher in European (Portuguese) than in Asian (Indonesian) turpentines. β-Pinene has a characteristic turpentine odor with a dry, woody or resinous aroma. In terms of atmospheric significance, α-pinene, the most abundant monoterpene in the atmosphere, accounts for more than 50% of global monoterpene emissions and is a major component of phytoncides — antimicrobial allelochemical volatile organic compounds that are related to forest healing and activation of recreational forests.

3. Common Forms and Preparations

β-Pinene is commercially available in several forms. β-Pinene is produced in large quantities by distillation of turpentine oils. It is industrially separated from turpentine oil on the rectification tower. Turpentine oil is defined as a well-known essential oil extracted by distillation from pine oleoresin, primarily composed of terpene hydrocarbons such as α-pinene and β-pinene, along with other oxygenated terpenes.

For research and pharmaceutical applications, β-pinene is often prepared as a cyclodextrin inclusion complex to improve bioavailability. Investigators have prepared the (-)-β-pinene/β-cyclodextrin (βP/β-CD) complex through physical mixture and slurry complexation methods, analyzed through differential scanning calorimetry, thermogravimetry, Fourier transform infrared spectroscopy, X-ray diffraction, docking, and scanning electron microscopy. This encapsulation approach enhances the compound's aqueous solubility and stability for oral delivery in preclinical models.

As a consumer ingredient, β-pinene is encountered in:

Essential oils — present as a natural constituent in turpentine, black pepper, lemon, nutmeg, and other steam-distilled plant oils.
Fragrance formulations — the refined β-pinene is the original ingredient of fragrance raw materials and can also be used in daily chemicals formulations.
Food flavoring — β-pinene occurs as a naturally identified flavor constituent in numerous food products.
Isolated/purified monoterpene — supplied as a laboratory-grade or industrial chemical, typically ≥98% purity, in liquid form.

4. Traditional and Historical Use

Although β-pinene itself was not isolated and identified as a discrete chemical entity until 1896, the botanical sources richest in this compound — primarily pine resins and turpentine — have a documented medicinal history spanning millennia. Historical use must therefore be understood as use of the whole resin/oil rather than of the isolated terpene.

4.1 Ancient and Classical Traditions

Turpentine has a long history of use, stretching back to ancient civilizations that utilized pine resin for medicinal purposes. In folk medicine, it was applied topically to treat wounds. Ancient Egyptians used pine resin for embalming, while in Europe, turpentine became a staple for treating wounds and respiratory issues. Ancient Greeks and Romans used pine resin extensively in medicine and ship maintenance. Traditional healers across Europe, North America, and Asia recognized turpentine's powerful antiseptic, expectorant, and anti-inflammatory properties long before modern science confirmed them.

4.2 Medieval and Early Modern Medicine

Although in the past turpentine had no or limited application in household economy, distillation of turpentine resulted in the oil that was introduced to medicine and materia medica during medieval times. The term 'turpentine oil' derives from the Latin word terebinthine, the name of the terebinth tree, and has been traditionally employed as an aseptic agent in the preparation of ointments and Zomad in Iranian traditional medicine.

The pinenes are the chief ingredients of turpentine, a solvent that was in widespread use as a diluent and cleaner when oil-based paints were in their heyday. It is also used in varnishes and as a raw material for synthesizing useful organic compounds.

4.3 19th-Century Clinical Medicine

For much of the 1800s, doctors used oil of turpentine to treat typhoid fever, intestinal worms, wound infections (then called "hospital gangrene"), and parasitic infestations of open wounds. It was considered a legitimate therapeutic tool, not a folk remedy. Turpentine, now understood to be dangerous for consumption, was a common medicine among seamen during the Age of Discovery. It was one of several products carried aboard Ferdinand Magellan's fleet during the first circumnavigation of the globe. Taken internally, it was used as a treatment for intestinal parasites.

4.4 Ayurvedic and Folk Medicine

In Ayurvedic and folk medicine traditions, turpentine was used to relieve joint pain, clear respiratory congestion, treat skin conditions, and repel insects. Turpentine and petroleum distillates such as coal oil and kerosene were used in folk medicine for abrasions and wounds, as a treatment for lice, and when mixed with animal fat, as a chest rub or inhaler for nasal and throat ailments.

Regarding pine needle oil specifically — a matrix in which β-pinene is a key constituent — pine needle oil from crude extract of pine needles has been used as an anti-cancer agent in traditional Chinese medicine, and its anti-cancer action is not devoid of scientific support today. Additionally, historical evidence supports the medicinal use of this pine species for treating respiratory ailments (cough, cold, and flu), skin infections, wounds, and inflammation.

5. Chemical Classification and Active Constituents

β-Pinene is classified as a bicyclic monoterpene with the molecular formula C₁₀H₁₆ and a molecular weight of 136.23 g/mol. β-Pinene is a monoterpene isolated from turpentine oil and numerous other plants' essential oils, which has a broad spectrum of biological activities. When present in whole essential oils, β-pinene typically co-occurs and interacts with its structural isomer α-pinene, and these two compounds may exert additive or synergistic pharmacological effects.

The two enantiomers — (+)-β-pinene [(1R,5R) configuration] and (−)-β-pinene [(1S,5S) configuration] — exhibit strikingly different biological profiles. The agar diffusion test showed that only the positive enantiomers of the α- and β-isomers of pinene were active. The minimal inhibitory concentration (MIC) and minimal microbicidal concentration (MMC) of these monoterpenes were confirmed, with the positive enantiomers exhibiting microbicidal activity against all fungi and bacteria tested with MICs ranging from 117 to 4,150 µg/mL. However, no antimicrobial activity was detected with the negative enantiomers up to 20 mg/mL. This stereochemical selectivity is a defining feature of β-pinene's pharmacology.

6. Established Mechanisms of Action

6.1 Antimicrobial and Antifungal Mechanisms

The potential of (+)-α-pinene and (+)-β-pinene to inhibit phospholipase and esterase activities has been evaluated, with the best inhibition results obtained with Cryptococcus neoformans. Inhibition of these virulence-associated enzymes is considered a key mode of action against pathogenic fungi. Additionally, preliminary antimicrobial mechanistic studies revealed that β-pinene-derived compounds may cause mycelium abnormalities, cell membrane permeability changes, and inhibition of the activity of ATP.

6.2 Cardiovascular Mechanisms

In relation to its antihypertensive activity, the established mechanism for β-pinene is endothelium-independent. β-Pinene induces endothelium-independent vasorelaxation by decreasing Ca²⁺ influx through L-type Ca²⁺ channels associated with a decrease in calcium sensitivity. More specifically, β-pinene induced endothelium-independent vasorelaxation possibly caused by inhibition of the Ca²⁺ influx through the L-type Ca²⁺ channel associated with a decrease in calcium sensitivity.

6.3 Central Nervous System Mechanisms (Antidepressant)

Linalool and β-pinene are two volatile monoterpenes that possess antidepressant-like activity. These are components of many aromatic plants used in folk medicine around the world to relieve anxiety and depression. Researchers have focused on examining the mechanism of action of these compounds. Using mouse models, WAY 100635 (a 5-HT1A receptor antagonist) blocked the antidepressant-like effect of β-pinene. Furthermore, propranolol and neurotoxin DSP-4 reversed the anti-immobility effect of β-pinene; also, SCH23390 blocked the antidepressant-like effect of β-pinene. These pharmacological probes collectively implicate both serotonergic (5-HT1A) and noradrenergic/dopaminergic pathways in the antidepressant-like mechanism. Results indicate that β-pinene produces an antidepressant-like effect through interaction with the monoaminergic system.

6.4 Anticonvulsant Mechanisms

In a pentylenetetrazole (PTZ) convulsion model in mice, β-pinene and the mixture of the two monoterpenes significantly reduced hippocampal nitrite level and striatal content of dopamine (DA) and norepinephrine (NE). This reduction in neurotransmitter excess and nitrite is proposed to underlie the protective effect against seizure-induced death.

6.5 Antitumor Mechanisms

β-Pinene has been evaluated in association with the established drug paclitaxel in non-small-cell lung cancer cells. The results revealed that the combination of paclitaxel with β-pinene showed a substantial synergistic effect, along with the expression of apoptotic proteins such as Bax/Bcl-2, Cyt-c, caspase-9, and caspase-3. These findings point to apoptosis induction via the intrinsic (mitochondrial) pathway as a major mechanism. More broadly, the action mechanisms of natural monoterpenes are wildly varied, with apoptosis the most prevalent, followed by cell cycle impairment, ROS production, autophagy, necroptosis, and others.

7. Scientific Evidence by Area of Use

7.1 Antimicrobial Activity

Evidence level: In vitro only; no human clinical trials.

The most rigorously characterized biological activity of the isolated β-pinene compound is its antimicrobial action. A pivotal in vitro study published in Molecules (PMC6268778) examined the enantiomers of α- and β-pinene against a panel of bacteria and fungi. Time-kill curves showed that (+)-α-pinene and (+)-β-pinene were highly toxic to Candida albicans, killing 100% of the inoculum within 60 min. By contrast, the bactericidal effect occurred after 6 h in methicillin-resistant Staphylococcus aureus (MRSA). Critically, no antimicrobial activity was detected with the negative enantiomers up to 20 mg/mL, underscoring that antimicrobial activity is stereospecific and limited to the (+) enantiomer.

Regarding synergy: in combination with commercial antimicrobials, ciprofloxacin plus (+)-α-pinene or (+)-β-pinene presented synergistic activity against MRSA, whereas an indifferent effect against all fungi was detected when amphotericin B was combined with the positive enantiomers of pinene.

For biofilm inhibition, C. albicans biofilm formation was prevented with the MIC concentration of (+)-α-pinene and twice the MIC value of (+)-β-pinene. C. albicans ATCC10231 biofilm formation was significantly reduced compared with control. Biofilm formation was 100% inhibited by the MIC of (+)-α-pinene. Although twofold MIC of (+)-β-pinene prevented biofilm formation, the MIC significantly reduced it by 54% (p < 0.01).

Separately, β-pinene proved to have equal antibiotic efficacy to α-pinene against S. aureus (MRSA), and C. neoformans and C. albicans biofilms. All antimicrobial evidence for β-pinene as an isolated compound is in vitro. No controlled human clinical trials have assessed β-pinene for treatment or prevention of infection.

7.2 Antiviral Activity

Evidence level: In vitro only; no human clinical trials.

A study published on PubMed (PMID 35001315) examined β-pinene's activity against human adenovirus type 3 using cytopathic inhibition test, MTT test, atomic force microscopy, and laser confocal microscopy. The mechanisms of the inhibitory action of β-pinene, a pine needle oil monoterpene, on human adenovirus type 3 were studied. β-Pinene inhibited the viruses more strongly than the reference antiviral medication ribavirin (p < 0.05). Inhibition of viral cytopathic effect (CPE) increased with increasing the concentration of β-pinene, which attested to direct elimination of adenovirus type 3. Elevation of β-pinene concentration significantly increased the cell survival rate (p < 0.05). These results are in vitro; clinical significance for human antiviral therapy is unknown.

7.3 Antifungal Activity (Candida and Biofilms)

Evidence level: In vitro; one molecular docking study.

The (+) enantiomer of β-pinene demonstrates fungicidal activity at concentrations confirmed by MIC/MMC methodology. The Molecules study (PMC6268778) found that the positive enantiomers were able to eliminate 100% of C. albicans in 60 min. However, total killing of MRSA only occurred after 6 h of incubation. A separate docking and derivatization study (PMC6749435) explored how structural modifications to the β-pinene scaffold could enhance antifungal potency, with certain amide and acylthiourea derivatives showing moderate or significant antifungal activity due to the fusion of the amide moiety or the acylthiourea moiety with the pinane skeleton. No clinical trials exist.

7.4 Antitumor / Anticancer Activity

Evidence level: In vitro and animal models only; no human clinical trials.

(-)-β-Pinene has demonstrated a cytotoxic effect against tumor cells. (-)-β-Pinene also showed selectivity in primary normal human gingival fibroblast, suggesting some degree of selectivity for cancerous vs. normal cells, though this requires further investigation. The most studied application is its synergy with paclitaxel in non-small-cell lung cancer: β-pinene demonstrated the ability to synergize with paclitaxel vs. non-small-cell A549 lung carcinoma cells with evidence of apoptosis. The expression of the apoptotic proteins Bax/Bcl-2, Cyt-c, caspase-9, and caspase-3 was observed in that combination study.

A wide range of pharmacological activities of β-pinene have been reported, including antibiotic resistance modulation, anticoagulant, antimicrobial, antimalarial, antitumor, and anti-inflammatory activities. Regarding mechanism, the action mechanisms of these natural products are widely varied, with apoptosis the most prevalent, followed by cell cycle impairment, ROS production, autophagy, necroptosis, and others. The studies confirm the antitumor properties of monoterpenes and their anticancer potential against various types of tumors, as demonstrated in in vitro and in vivo studies. All current evidence is preclinical; β-pinene has not been evaluated in human oncology trials.

7.5 Antidepressant and Anxiolytic Activity

Evidence level: Animal models only (rodents); no human clinical trials.

Linalool and β-pinene are two volatile monoterpenes that possess antidepressant-like activity. These are components of many aromatic plants used in folk medicine around the world to relieve anxiety and depression. The primary mechanistic study used the forced swimming test (FST) in mice. Both α- and β-pinene have been reported to have anxiolytic and antidepressant properties. Intraperitoneal injection of β-pinene (100 mg/kg) increased locomotion and reduced anxiety in the forced swim test. A study on Litsea glaucescens essential oil identified β-pinene and linalool as active principles of antidepressant activity.

All published evidence for β-pinene's CNS/antidepressant effects is from rodent models using forced swimming tests and similar behavioral paradigms. There are no controlled human studies, no dose-finding trials, and no evidence base from which to project these findings to clinical practice. The evidence is preliminary and animal-derived only.

7.6 Anticonvulsant Activity

Evidence level: Animal models only; no human trials.

In a comparative study of α- and β-pinene in mice, animals were orally treated with α-pinene (100, 200, and 400 mg/kg), β-pinene (100, 200, and 400 mg/kg), and the equimolar mixture (400 mg/kg) and subjected to the pentylenetetrazole-induced convulsions model. Only the dose of 400 mg/kg of the compounds was able to significantly decrease seizure intensity. The latency of the first convulsion was significantly increased by the mixture of α- and β-pinene (400 mg/kg). β-Pinene and the mixture of the two monoterpenes, both at 400 mg/kg, significantly increased the time of death of animals. These are rodent-model findings and carry no established translational value for human epilepsy management.

7.7 Antihypertensive and Cardiovascular Activity

Evidence level: Animal models and isolated tissue; no human clinical trials.

A study on the (−)-β-pinene/β-cyclodextrin complex in rats (Moreira et al., 2016, published in Current Pharmaceutical Biotechnology) examined the antihypertensive effect using direct aortic blood pressure measurements. Normotensive or L-NAME-induced hypertensive rats were used in pharmacological experiments. Mean arterial pressure (MAP) was determined with direct blood pressure measurements from the abdominal aorta. The drugs were orally administered and their effects were recorded during 48 hours. The key finding: in hypertensive rats (MAP = 156±16 mmHg), the complex, but not βP alone, promoted hypotension at 36 and 48 hours after administration. Free β-pinene without cyclodextrin encapsulation did not produce the antihypertensive effect, highlighting the role of complexation in enabling bioavailability. Pharmacological results demonstrated that the complex promoted antihypertensive effect. Furthermore, β-pinene induced endothelium-independent vasorelaxation possibly caused by the inhibition of the Ca²⁺ influx through L-type Ca²⁺ channel associated with a decrease in calcium sensitivity.

7.8 Anti-Inflammatory Activity

Evidence level: In vitro and animal models; no human clinical trials.

Previous studies demonstrate that β-pinene (as well as other pinene structural isomers) exhibits antispasmodic, anti-inflammatory, hypotensive, antifungal, antihypertensive, antimicrobial, anti-depressant, and sedative activities. A wide range of pharmacological activities of α- and β-pinene have been reported, such as anticoagulant, anti-inflammatory, anti-leishmania, antimalarial, antimicrobial, antioxidant, antitumor, analgesic, and antibiotic resistance modulation effects. These activities have been documented primarily in cell culture and animal experiments; controlled human studies are absent.

8. Body Systems and Health Areas Associated with β-Pinene

Immune/Antimicrobial System: In vitro fungicidal and bactericidal activity against C. albicans, C. neoformans, and MRSA; biofilm disruption; antiviral effects against adenovirus type 3 in cell culture.
Central Nervous System: Antidepressant-like and anxiolytic-like activity in rodent models via monoaminergic (5-HT1A, noradrenergic, dopaminergic) pathways; anticonvulsant effects at high doses in PTZ models.
Cardiovascular System: Vasorelaxation via L-type Ca²⁺ channel blockade (endothelium-independent); antihypertensive effect demonstrated in rat models when formulated as a β-cyclodextrin complex.
Oncology (Preclinical): Cytotoxic against tumor cell lines; synergy with paclitaxel in non-small-cell lung carcinoma; apoptosis induction via Bax/Bcl-2 and caspase pathways.
Respiratory System: Traditional use of turpentine (which contains β-pinene) as an expectorant and decongestant; pine needle oil used traditionally for respiratory ailments.
Integumentary/Wound System: Traditional topical use of turpentine for wound treatment and skin infections; antimicrobial properties investigated in vitro.

9. Dosage Forms and Dosages Reported in Studies

No standardized human dosage exists for β-pinene as an isolated compound. The following dosages have been reported only in preclinical (animal) studies:

Anticonvulsant study (mice, oral): Animals were orally treated with β-pinene at 100, 200, and 400 mg/kg. Only the dose of 400 mg/kg was able to significantly decrease seizure intensity.
Antidepressant study (mice, intraperitoneal): Intraperitoneal injection of β-pinene at 100 mg/kg increased locomotion and reduced anxiety in the forced swim test.
Antihypertensive study (rats, oral, β-CD complex): Mean arterial pressure was determined from the abdominal aorta. Drugs were orally administered and effects were recorded during 48 hours. The β-pinene/β-cyclodextrin complex was used; the free compound alone did not produce hypotension.
Acute toxicity (rodents, oral): Following oral administration, a mild sedation was observed and no deaths were recorded; the LD50 estimated for both monoterpenes was greater than 2,000 mg/kg, p.o. Separately, in a study in rats, the reported oral LD50 for β-pinene was 4,700 mg/kg bw. Sub-lethal signs of toxicity included local irritation, central nervous system depression, and respiratory distress.
In vitro antimicrobial: MICs of the positive enantiomers ranged from 117 to 4,150 µg/mL.
Human inhalation (metabolic/pharmacokinetic study): In a metabolic study, 8 male volunteers were exposed to 450 mg/m³ (75 ppm) turpentine in an exposure chamber for 2 hours during light physical exercise. Approximately 65% of the inhaled β-pinene was absorbed and 5% of the uptake was detected in the expired air. Blood levels peaked 2 hours after administration and the chemical was rapidly eliminated.

10. Safety Considerations and Toxicology

10.1 General Toxicological Profile

Rat oral LD50 values for beta-pinene indicate this material to be very low in oral acute toxicity, with LD50 values in the range from 3,388 mg/kg to greater than 5,000 mg/kg. Rabbit dermal LD50 values similarly indicate very low toxicities with values greater than the limit doses of 2,000 or 5,000 mg/kg. Despite this low acute oral toxicity in animals, sub-lethal systemic effects have been documented: in a study in rats the reported oral LD50 for beta-pinene was 4,700 mg/kg bw. Sub-lethal signs of toxicity included local irritation, central nervous system depression, and respiratory distress.

10.2 Skin and Mucous Membrane Irritation

Turpentine and the monoterpenes (alpha-pinene, beta-pinene, 3-carene) are skin and mucous membrane irritants, and in high concentrations, are central nervous system (CNS) depressants. β-Pinene is a dermal sensitizer (per ACGIH) and a skin and mucous membrane irritant; absorption of large doses may cause delirium, ataxia, and injury to the kidneys. β-Pinene is mildly toxic by ingestion and is a skin irritant.

10.3 Dermal Absorption and Occupational Exposure

β-Pinene is absorbed through the gastrointestinal and respiratory tract and skin. Occupational health assessments have found that skin absorption alone can deliver more than 25% of the systemically tolerable amount of alpha-pinene and beta-pinene, which is why it carries a formal skin-absorption warning in workplace safety guidelines. An occupational Initial Threshold Screening Level (ITSL) has been proposed: it is recommended that the ITSL for turpentine, along with select monoterpenes (α-pinene, β-pinene, and Δ3-carene) be set at 1,120 µg/m³ based on an 8-hour averaging time.

10.4 Inhalation Hazards

Acute inhalation toxicity may cause mucosal irritations. Inhalation may lead to the formation of edemas in the respiratory tract. Breathing turpentine fumes causes irritation of the airways, coughing, and difficulty breathing. At higher concentrations it can trigger throat swelling severe enough to obstruct airflow. The nervous system is particularly sensitive: inhaling or ingesting turpentine can cause dizziness, drowsiness, headache, tremors, staggering, and seizures.

10.5 Aspiration Hazard

The substance is known to cause human aspiration toxicity hazards or has to be regarded as if it causes a human aspiration toxicity hazard. Aspiration may cause pulmonary edema and pneumonitis. This is a critical safety consideration given the compound's low viscosity as a liquid.

10.6 Renal and CNS Toxicity at High Doses

After absorption of toxic quantities, CNS disorders have been reported, along with toxic effects on the kidney. This is consistent with classical observations from turpentine toxicity, in which renal tubular damage is a recognized consequence of systemic exposure.

10.7 Peroxide Formation and Cosmetic Restrictions

Like other members of the Pinaceae-derived terpene family, β-pinene can oxidize in air to form allylic peroxides. Regulatory attention has been directed at this: Pinacea derivatives, including the chemicals in this group, are included in the International Fragrance Association (IFRA) Standards: Essential oils and isolates derived from the Pinacea family should only be used when the level of peroxides is kept below 10 mM. This limit applies to the substance and not to the finished product. Peroxide formation is the primary mechanism by which aged or oxidized preparations of β-pinene become skin sensitizers.

10.8 Metabolism and Elimination

In a metabolic study, male albino rabbits (6/group) received a single oral dose of 400–700 mg/kg bw β-pinene. Over 3 days, more than 80% of the chemical was recovered in the urine as glucuronic acid conjugates, indicating rapid hepatic conjugation and renal elimination as the primary metabolic fate. The human inhalation data (see Section 9) showed blood levels peaked at 2 hours and the compound was rapidly eliminated.

References

Health Conditions

Health conditions that Beta-pinene may help support.

No conditions available.

Body Systems

Body systems that Beta-pinene may help support.

No body systems available.