Pinene is a monoterpene (C10H16) that gives pine needles, rosemary and many cannabis varieties their sharp, woody smell. It occurs as alpha-pinene and beta-pinene and is the main component of turpentine. Industry uses it in fragrances, flavourings and solvents. It is one of the terpenes behind the resinous note of the hemp Formula Swiss grows in Switzerland.
Key facts
- Chemical class
- Bicyclic monoterpene (a hydrocarbon), C10H16, with two isomers, alpha- and beta-pinene.
- Where it occurs
- Pine and other conifers, rosemary, basil, parsley, hemp and cannabis. Turpentine is mostly pinene.
- Legal status
- Not a controlled substance. It is used legally in fragrances, flavourings and solvents.
- In Formula Swiss products
- Our product data does not state a pinene content, so we make no claim about it.
Terpenes in the cannabis plant are fascinating, giving each strain its unique scent. Among them, pinene stands out with its crisp aroma and its broader role within the plant and beyond.
At Formula Swiss we grow several varieties of Cannabis sativa in Switzerland, indoors, outdoors and in greenhouses. Pinene is one of the terpenes behind the sharp, resinous note in hemp’s aroma, the same molecule that makes a pine forest smell the way it does.
This article explores pinene in depth, from its natural sources to its importance in cannabis and its presence in everyday products.
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Key takeaways
- Pinene is a terpene known for its distinct pine-like aroma.
- It exists in two forms: alpha-pinene and beta-pinene.
- Pinene is found in cannabis, pine trees, rosemary and basil.
- This terpene contributes to the scent and flavour of cannabis strains.
- Pinene is widely used in fragrances, cleaning products and as a flavouring agent.
Explanation of terpenes in cannabis
Terpenes are naturally present in a wide variety of plants, including fruits, vegetables, herbs and spices. They give these plants their distinctive aromas and contribute to their overall character.
In cannabis, researchers have identified over 100 different terpenes so far. Each one has its own chemical makeup, which helps shape the scent and flavour of a particular variety. The overall experience of a cannabis strain is influenced not only by cannabinoids, but also by the unique blend of terpenes it contains.
Importance of pinene as a terpene in cannabis
Pinene is one of the most prominent terpenes found in cannabis. It is known for its distinctive pine-like scent, which can be more or less intense depending on how much of it is present in a particular variety.
A 2021 study published in the journal Biomolecules examined limonene and alpha-pinene in bacterial-cell experiments. It studied how both compounds damage bacterial cell membranes, which helps explain their antimicrobial activity in the lab.
Overall, pinene stands out for its unique aroma and the way it contributes to the overall character of different cannabis strains.
What is pinene?
Have you ever walked through a forest and noticed the fresh aroma of pine trees? That scent comes from the presence of a terpene called pinene.
Terpenes are organic compounds found in plants that contribute to their aroma and flavour. Pinene includes alpha-pinene and beta-pinene, which are related but distinct compounds. Alpha-pinene is widely found in nature and contributes to the characteristic aroma of pine trees.
Pinene has a molecular formula of C10H16 and exists in two forms: alpha-pinene and beta-pinene. Alpha-pinene has a sweet, woody scent, while beta-pinene has a more herbal aroma.
Definition and chemical structure of pinene
Pinenes belong to the monoterpene group, with a carbon skeleton derived from two isoprene units. Each has 10 carbon atoms in a bicyclic framework and one carbon–carbon double bond. Alpha-pinene and beta-pinene differ in the position of that double bond, as described below.
In the atmosphere, pinenes react with oxidants such as ozone, hydroxyl radicals and nitrate radicals. Atmospheric chemistry research examines how these reactions affect air quality. Pinene emitted by forests reacts with ozone and other oxidants and helps form the blue haze seen over pine forests.
Sources of pinene in nature
Pinenes are widely found in nature and can also be produced through other processes:
Natural sources:
- Coniferous trees: Pine, fir, spruce, cypress and juniper.
- Herbs: Rosemary, basil, dill, parsley and sage.
Other production methods:
- Chemical synthesis: Pinenes can be created through industrial processes.
- Microbial activity: Researchers have produced pinene using engineered microorganisms.
Pinene in cannabis
Cannabis is a complex plant that contains hundreds of compounds, including cannabinoids, terpenes and flavonoids. Terpenes are particularly interesting because they contribute to the aroma of cannabis. One of the most important terpenes found in cannabis is pinene.
Presence and concentration of pinene across cannabis varieties
The presence and concentration of pinene vary between cannabis samples. Genetic and chemical research shows that commercial sativa and indica labels poorly describe overall variation. These labels alone cannot establish the pinene content of a particular plant or product; the relevant sample needs chemical analysis.
Only a lab analysis of a specific batch shows how much pinene it contains. The balance between pinene and other aroma compounds shapes the overall scent.
Effects of pinene on the aroma profile of cannabis
Pinene has a unique aroma that is often described as piney or woody. This distinct scent can be detected even when present in low concentrations within a strain's chemical composition.
In addition to its piney aroma, it also provides a fresh scent, which helps mask the strong odour associated with certain strains. In terms of flavour, pinenes provide a fresh taste similar to mint or eucalyptus, which can be pleasant in cannabis products containing high levels of pinene.
Types of pinene
Pinene is a terpene found across a variety of cannabis strains, as well as numerous other plants, including pine trees, rosemary and basil. There are two types of pinene: alpha-pinene and beta-pinene. These two types have similar chemical structures but differ in how the atoms are arranged, resulting in distinct properties that affect their aroma.
Differences between alpha-pinene and beta-pinene
Alpha-pinene is the most commonly found type of pinene. It carries a strong, fresh aroma that resembles pine needles or fir trees. This terpene is primarily known for its distinct scent.
Beta-pinene, on the other hand, has a sweet, woody aroma reminiscent of rosemary or basil. While less common than alpha-pinene, it offers its own aromatic qualities.
Both alpha-pinene and beta-pinene are present in various cannabis strains, with concentration levels influenced by genetics and growing conditions. Their aromatic profiles contribute to the overall sensory experience of these strains.
The main difference between alpha-pinene and beta-pinene lies in their molecular structure. Alpha-pinene has a double bond between carbon atoms 2 and 3, whereas beta-pinene has an exocyclic double bond rather than one at C2-C3.
Alpha-pinene and beta-pinene can occur in different cannabis varieties. A sativa, indica or hybrid label is not a substitute for measuring the two compounds in the specific sample. Genetics, cultivation and processing can affect the resulting chemical profile.
What does pinene do in the body?
When people breathe in alpha-pinene, about 60% is absorbed. In a controlled exposure study, some volunteers reported irritation at higher concentrations, although lung function was unchanged (Falk et al., 1990). In receptor tests, alpha- and beta-pinene did not act at the CB1 or CB2 cannabinoid receptors (Finlay et al., 2020). Reviews have proposed that pinene might modify some effects of THC, but this has not been tested in people (Russo, 2011).
Industrial uses of pinene
Pinene is not only studied for botanical purposes but also has various industrial applications. One of the most common industrial uses of pinene is as a solvent for cleaning products due to its strong solvency power. It is also used as a flavouring agent in food products.
Furthermore, pinene's aromatic properties make it suitable for use as an ingredient in perfumes and fragrances. Its ability to dissolve oils makes it a candidate for use in manufacturing paints, varnishes and adhesives.
Frequently asked questions
What is pinene?
Pinene is one of the most common terpenes in nature and in cannabis. There are two types of pinene structures, alpha and beta. Alpha-pinene is one of the most abundant terpenes found in nature and is part of the monoterpene family.
What are the sources of pinene in nature?
Pinene is found in various fresh herbs such as rosemary, basil, dill, cedar, eucalyptus, parsley and some citrus varieties like lime and lemon peel. It is also a major component of turpentine, a mixture used as a solvent and cleaner, including in paint and varnish work.
What are the two types of pinene?
There are two types of pinene: alpha-pinene and beta-pinene. These compounds are known for their distinct aromatic profiles and structural differences. They contribute to the characteristic scents found in various plants, including coniferous trees and herbs, and play a role in the overall sensory experience associated with certain botanical sources.
What are some cannabis strains high in pinene?
Names such as Blue Dream, OG Kush and Strawberry Cough are often mentioned, but a name alone does not show high pinene content. Check a chemical analysis of the particular batch rather than relying on the cultivar label.
What is the difference between alpha-pinene and beta-pinene?
Alpha-pinene and beta-pinene are two forms of the same terpene. Alpha-pinene is more common and smells sharply of pine; beta-pinene smells more herbal and woody. Both contribute to the distinctive fragrance of many plants.
How does pinene interact with other cannabis compounds?
Pinene contributes to the aroma of cannabis. A proposed entourage effect is still unproven: in receptor tests, pinene did not act at CB1 or CB2 (Finlay et al., 2020).
This article is for information only and does not describe any product in our shop. Formula Swiss oils are cosmetics for external use. See our full disclaimer.
Last reviewed:
Sources
- Melkina OE et al. (2021). The Mode of Action of Cyclic Monoterpenes (-)-Limoneneand (+)-α-Pinene on Bacterial Cells. Biomolecules. pmc.ncbi.nlm.nih.gov/articles/PMC8227088/
- Rolletter M et al. (2019). Investigation of the α-pinene photooxidation by OH in the atmospheric simulation chamber SAPHIR. Atmospheric Chemistry and Physics. acp.copernicus.org/articles/19/11635/2019/acp-19-11635-2019.
- Sarria S et al. (2014). Microbial synthesis of pinene. ACS Synth Biol. pubmed.ncbi.nlm.nih.gov/24679043/
- Watts S et al. (2021). Cannabis labelling is associated with genetic variation in terpene synthase genes. Nature Plants. www.nature.com/articles/s41477-021-01003-y
- Falk AA et al. (1990). Uptake, distribution and elimination of alpha-pinene in man after exposure by inhalation. Scand J Work Environ Health. pubmed.ncbi.nlm.nih.gov/2255878/
- Finlay DB et al. (2020). Terpenoids From Cannabis Do Not Mediate an Entourage Effect by Acting at Cannabinoid Receptors. Front Pharmacol. pubmed.ncbi.nlm.nih.gov/32269529/
- Russo EB (2011). Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects. Br J Pharmacol. pubmed.ncbi.nlm.nih.gov/21749363/
