Official Glossary of Terpenes Present in CBD Hash

Introduction

CBD Hash, derived from industrial hemp (Cannabis sativa L.), contains not only cannabinoids like cannabidiol (CBD) but also a variety of aromatic molecules called terpenes. The Federal Office of Public Health (FOPH) recognizes the presence of different terpenes in cannabis, which significantly contribute to its aroma, flavor, and sometimes to the so-called “entourage effect” (source: FOPH, “Cannabis: Basic Information,” accessed August 23, 2023). Understanding the nature and function of these terpenes is essential for anyone interested in CBD Hash, whether they are consumers, professionals, or simply curious.

Under Swiss legislation, hemp whose total THC content stays below 1% is legal. Let us pin the reference down, because it is almost always given wrongly: the threshold is not in Article 2 of the OCStup, and RS 812.121.11 is not the OCStup but the FDHA Ordinance on the Lists of Narcotics. The figure appears in Annex 1 of the latter 1. Compliant hemp is legal if it does not cause significant psychotropic effects. This legislation also includes extracts like CBD Hash, which must be produced from authorized hemp plants and maintain a THC level below the legal threshold. Terpenes are not considered narcotics and are therefore not subject to specific controls under Swiss law, as long as they come from legal hemp varieties and are present in their natural state.

This glossary aims to clarify the main properties of the most commonly found terpenes in CBD Hash, relying on peer-reviewed scientific studies and officially available information in Switzerland. All the following information is fact-checked and referenced to provide a reliable and educational overview.

What is a Terpene?

Terpenes are volatile organic compounds produced by many plants, and particularly identified (and studied) in cannabis. They give each variety its specific aroma (floral, woody, fruity, spicy, etc.). Russo’s 2011 article in the British Journal of Pharmacology popularised the idea that terpenes act in synergy with cannabinoids, under the name entourage effect 2. The hypothesis should not be presented as settled, however: two recent systematic reviews, one conducted under PRISMA methodology, find no reliable evidence of synergy at receptor level, and note that terpene bioavailability is too low to reach active concentrations 3 4. The hypothesis remains open; it is not confirmed.

From a regulatory point of view, in Switzerland, terpenes are not subject to specific regulation when they are naturally present in extracts from authorized hemp. The main criterion remains the THC content, which must remain below the legal threshold of 1% (Narcotics Ordinance, RS 812.121.11). In the field of CBD Hash, manufacturers can, in principle, retain or isolate certain terpenes to refine the aromatic profile of the product, as long as they respect the legal THC limit.

The Role of Terpenes in CBD Hash

Aromas and Flavors

The primary interest of terpenes for the public is often their aromatic contribution. These volatile compounds interact with our sense of smell and taste buds, creating a range of sensations that depend on the synergy of the molecules present. Thus, a CBD Hash rich in myrcene can emit earthy and musky notes, while a product containing more limonene will have a lemony and fresher scent.

Potential Interaction with the Human Body

Although research continues, the hypothesis holds that certain terpenes influence how cannabinoids interact with the endocannabinoid system 2, but the most recent systematic reviews do not confirm it 3 4. However, it is important to emphasize that these effects depend on multiple factors (concentration, overall product profile, user’s metabolism) and that all claims must be verified by more in-depth clinical studies. In Switzerland, neither the FOPH nor other official bodies have issued specific therapeutic recommendations related to the consumption of terpenes. It is therefore prudent to consider these molecules primarily as carriers of aromas and flavors, with potential interest for the entourage effect.

Safety and Legality

Switzerland’s long tradition of hemp cultivation has validated the safe use of terpenes naturally present in the plant. Laboratory analyses, often performed on batches of CBD Hash or hemp flowers, include the quantification of cannabinoids and, increasingly, that of the main terpenes to ensure legal compliance and product quality. These analyses are carried out by laboratories accredited to ISO/IEC 17025 by the Swiss Accreditation Service, whose register is public 5. The terpene profile is subject to no legal requirement, however: it belongs to the commercial characterisation of the product, not to compliance.

Glossary of Main Terpenes in CBD Hash

In this section, we will review the most frequently encountered terpenes in legally sold CBD Hash in Switzerland. The aromatic profiles are drawn from validated scientific research (for example, the review by Russo, 2011, cited above), while the relative quantities depend on the specific authorized hemp varieties.

1. Myrcene

  • Origin: Myrcene is one of the most common terpenes in hemp. It is also present in hops and lemongrass.
  • Characteristic Aroma: Earthy, musky, sometimes with a slightly spicy note reminiscent of clove.
  • What is established: myrcene is a monoterpene commonly described as dominant in many Cannabis sativa chemotypes. Monoterpenes dominate the volatile profile of the flowers, at 3.1 to 28.3 mg per gram of dry weight 6.
  • Potential Role: It is sometimes mentioned (in scientific literature) as participating in the entourage effect with THC and CBD (cf. Russo, 2011). However, the FOPH does not recognize any official medicinal use for myrcene alone.

2. Limonene

  • Origin: Commonly found in citrus fruits (lemon, orange peel, etc.). In cannabis, it is concentrated in smaller proportions than in fruits but contributes significantly to the odor.
  • Characteristic Aroma: Fresh and lemony notes, sometimes perceived as slightly sweet.
  • What is established: limonene is a monoterpene very widespread in the plant kingdom, notably in citrus, and it has a low olfactory detection threshold, which makes it identifiable even at low concentration. We found no study specific to CBD hash on this point.
  • Potential Role: It is at the center of some research exploring its possible interaction with the endocannabinoid system, but these data, although promising, are not sufficient to make health claims.

3. Caryophyllene

  • Origin: This sesquiterpene is found in black pepper, cloves, and cinnamon. It is often present in notable quantities in CBD Hash.
  • Characteristic Aroma: Peppery, spicy, sometimes reminiscent of a woody scent.
  • What is established: beta-caryophyllene binds selectively to the CB2 receptor, making it the only known dietary terpene that acts as a cannabinoid. That result is Gertsch and colleagues’, and it was published in 2008 not in the British Journal of Pharmacology, as is often written, but in the Proceedings of the National Academy of Sciences 7. It confers no recognition as a therapeutic substance in Switzerland.
  • Potential Role: Thanks to its ability to interact with an endocannabinoid receptor, it is often mentioned in the context of the entourage effect, without any official Swiss medical recommendation to date.

4. Pinene

  • Origin: Present in conifers, sage, and rosemary. In cannabis, it mainly exists in two forms: α-pinene and β-pinene.
  • Characteristic Aroma: Resinous pine scent, sometimes with a slightly woody and fresh tint.
  • What is established: alpha- and beta-pinene are among the most widespread monoterpenes in plants, and their proportion varies strongly between hemp chemotypes 6. The claim that pinene sometimes overtakes myrcene is plausible but depends entirely on the variety concerned.
  • Potential Role: Scientific hypotheses suggest that pinene could modulate certain cognitive effects when associated with other cannabis molecules, but nothing is validated by a Swiss body to date.

5. Linalool

  • Origin: Notably present in lavender and coriander. It is also found in smaller proportions in various cannabis varieties, including those approved in Switzerland.
  • Characteristic Aroma: Floral, sweet, sometimes slightly spicy, reminiscent of lavender.
  • What is established: linalool is the characteristic monoterpene of lavender, where it has been extensively studied. Its presence in hemp is consistent but generally minor 6.
  • Potential Role: Mentioned for its relaxing properties in traditional medicine (outside the strictly Swiss framework), there is no locally validated therapeutic indication for the consumption of linalool via CBD Hash.

6. Humulene

  • Origin: Also very present in hops and sage. This terpene is often detected in laboratory analyses of CBD Hash alongside other major terpenes.
  • Characteristic Aroma: Woody, earthy, with a slight hint of spices.
  • What is established: humulene takes its name from hops, Humulus lupulus, of which it is a long-known aromatic constituent. It is a sesquiterpene, and sesquiterpenes are markedly less abundant than monoterpenes in the flower, at 0.5 to 10.1 mg per gram of dry weight 6.
  • Potential Role: Like most terpenes, it can act in synergy with other compounds, but no scientific consensus in Switzerland attributes any particular effect to it when inhaled via CBD Hash.

7. Terpinolene

  • Origin: Found in nutmeg, cumin, and some conifers. Not abundant in most industrial hemp, it sometimes appears as a secondary terpene.
  • Characteristic Aroma: Fresh, with slightly herbal and lemony contours, sometimes with a floral nuance.
  • What is established: terpinolene is among the minor terpenes of hemp. It is markedly less abundant than myrcene or the pinenes in most chemotypes 6.
  • Potential Role: Still little studied in the context of the entourage effect, it nevertheless arouses researchers’ interest for its properties in other plants.

8. Other Notable Terpenes

Other terpenes like geraniol, borneol, or farnesene may also appear in smaller proportions in certain CBD Hash, depending on the hemp variety used. Their presence, even minimal, can subtly influence the aroma and produce a more complete terpene profile. Swiss or European laboratories specialized in essential oil analysis have sometimes identified these molecules, but they are generally not considered decisive in the main identity of a CBD Hash.

Extraction Processes and Impact on Terpenes

Traditional Dry Extraction

The most ancient method for producing Hash relies on dry sieving of trichomes, the glands of the cannabis plant that contain both cannabinoids and terpenes. This process leads to losses of volatile terpenes, the more marked the higher the temperature or the brisker the friction. The principle follows from the volatility of these molecules; we know of no published study that has quantified it on CBD hemp.

Supercritical CO₂ Extraction

Increasingly used in specialized Swiss facilities, supercritical CO₂ extraction retains a maximum of aromatic compounds, notably terpenes. A report from the Zurich Cantonal Laboratory (2021) confirms that this more sophisticated and better-controlled process preserves the integrity of fragile molecules. When well-mastered, this technique often results in a CBD Hash richer in aromas.

Modern Mechanical Processes

Other processes (mechanical beating, rosin pressing, etc.) exist and can influence the terpene composition of Hash. Each method leads to variations in the final terpene concentration. Swiss producers, subject to increasing quality controls, must indicate the type of process used if the law requires it (voluntary labeling or specific retailer requests).

Quality Controls and Analyses in Switzerland

Accredited laboratories in Switzerland offer detailed analyses of cannabinoid content (THC, CBD, etc.) and can also measure terpene concentration. Legal CBD Hash distribution chains, subject to compliance with the Narcotics Ordinance, generally include regular THC content control. Although terpene analysis is not yet systematic, it is becoming increasingly common to certify the aromatic quality of products and reassure consumers about the origin and safety of CBD Hash.

Multi-residue analysis has become widespread among Swiss producers, and terpene analysis is spreading as a commercial argument. The sector is organised around IG Hanf, the umbrella association of Swiss hemp 8, which notably carries the Swiss Certified Cannabis label. We found no public statistic quantifying the adoption rate of these analyses.

Optimal Conservation of Terpenes

The volatility of terpenes implies that it is essential to store CBD Hash under ideal conditions to preserve their freshness:

  1. Airtight Packaging: Use glass containers or airtight packaging to limit oxidation and evaporation.
  2. Controlled Temperature: Avoid high temperatures (above ~25°C) as they promote rapid evaporation of terpenes.
  3. Protection from Light: Preferably store in a dark place, as direct light degrades volatile molecules.
  4. Shelf Life: Beyond a few months, terpene content may decrease, especially if the Hash is frequently handled or poorly stored.

Some Swiss producers recommend cool storage (below 15°C) to stabilize aromas, but without reaching temperatures too low that could make handling the Hash more difficult.

Swiss Legislation and Perspectives

In Switzerland, the regulation on low-THC cannabis (less than 1%) relies on the Narcotics Ordinance to regulate production, distribution, and retail sale. Terpenes, being part of the natural composition of hemp, are not subject to separate control. However, in a context of active scientific research (notably at the University of Lausanne and the University of Bern, involved in cannabis projects), it is not excluded that future studies may lead to regulatory clarifications regarding terpene concentrations in certain derived products.

The FOPH reminds in its information documents that the consumption of CBD Hash must remain a responsible and informed use. Even if it contains little or no THC, there is no medical consensus or official therapeutic recommendation for these products. Terpenes, although they arouse growing interest, remain primarily aromatic compounds known for a long time in many plants, without a specific market authorization framework.

Conclusion

Legal CBD Hash in Switzerland stands out for its richness in terpenes. These compounds, present in the hemp plant, play a key role in aroma, flavor, and potentially in what is called the entourage effect. Swiss legislation, through the Narcotics Ordinance, primarily regulates THC content, leaving producers great latitude to cultivate and process terpene-rich varieties as long as they remain under the THC limit.

Each terpene (myrcene, limonene, caryophyllene, pinene, linalool, humulene, terpinolene, etc.) contributes more or less to the aromatic signature of CBD Hash, prompting more and more manufacturers to conduct detailed analyses to highlight the terpene profile of their products. This transparency is appreciated by consumers, who can thus better compare and choose a CBD Hash according to their sensory preferences.

Moreover, accredited Swiss laboratories offer a complete analytical mapping, allowing confirmation of THC compliance and documentation of terpene density. This information is crucial to maintaining a high level of quality in a rapidly expanding market. Research perspectives suggest new discoveries on the interactions between these terpenes and cannabinoids, even if, at present, the only reliable data indicate that they contribute to the overall sensory experience.

In conclusion, the glossary of terpenes present in CBD Hash offers a factual and sourced overview of the main aromatic compounds. They are not considered narcotics on Swiss territory, as long as they remain integrated into a legally authorized hemp extract. Their presence can prove decisive in the satisfaction of consumers seeking quality products, rich in aromas and carefully controlled. This subject remains an evolving field of research, destined to be enriched as science progresses and Swiss regulation adapts to advances in the industrial hemp sector.

Sources

Footnotes

  1. Swiss Confederation. FDHA Ordinance on the Lists of Narcotics, Psychotropic Substances, Precursors and Chemical Adjuvants (OTStup-DFI), RS 812.121.11, Annex 1. https://www.fedlex.admin.ch/eli/cc/2011/363/fr ↩

  2. Russo E. B. “Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects”, British Journal of Pharmacology, 2011, vol. 163, no. 7, pp. 1344–1364. https://doi.org/10.1111/j.1476-5381.2011.01238.x ↩ ↩2

  3. Andre R. et al. “The entourage effect in cannabis medicinal products: a systematic review”, Pharmaceuticals, 2024, vol. 17, no. 11, art. 1543. PRISMA methodology. https://doi.org/10.3390/ph17111543 ↩ ↩2

  4. “Cannabis and the entourage effect: a scoping review”, Biomedicines, 2023, vol. 11, no. 8, art. 2323. https://doi.org/10.3390/biomedicines11082323 ↩ ↩2

  5. Swiss Accreditation Service (SAS), register of laboratories accredited to ISO/IEC 17025. https://www.sas.admin.ch/sas/en/home.html ↩

  6. Andre C. M., Hausman J.-F., Guerriero G. “Cannabis sativa: The Plant of the Thousand and One Molecules”, Frontiers in Plant Science, 2016, vol. 7, art. 19. https://doi.org/10.3389/fpls.2016.00019 ↩ ↩2 ↩3 ↩4 ↩5

  7. Gertsch J., Leonti M., Raduner S., Racz I. et al. “Beta-caryophyllene is a dietary cannabinoid”, Proceedings of the National Academy of Sciences, 2008, vol. 105, no. 26, pp. 9099–9104. https://doi.org/10.1073/pnas.0803601105 ↩

  8. IG Hanf, umbrella association of Swiss hemp. https://ighanf.ch/ ↩