CONTENTS

CONTENTS

Cannabis chemistry

Understanding acids and cannabinoids

Cannabis is a marvel of nature, offering a unique mix of compounds that deliver a wide range of effects. To fully understand its impact on the mind and body, let’s explore its essential chemical players: cannabinoid acids, active cannabinoids, and terpenes.

Cannabinoid acids: the raw form

Before heating or processing, cannabinoids exist as acids. These raw forms have distinct properties:

  1. THCA (Tetrahydrocannabinolic acid)
    Found in fresh cannabis; non-psychoactive but believed to have anti-inflammatory properties. It converts to THC through decarboxylation.
  2. CBDA (Cannabidiolic acid)
    The precursor to CBD; known for potential anti-nausea and anti-inflammatory benefits.
  3. CBGA (Cannabigerolic acid)
    Often called the “mother cannabinoid”, as it transforms into THCA, CBDA, or CBCA during plant growth.

Major cannabinoids: activated by heat

When heated or exposed to light, cannabinoid acids convert into their active forms:

  1. THC (Tetrahydrocannabinol)
    The primary psychoactive compound in cannabis, associated with its “high.” Also noted for potential medical benefits, including pain relief and appetite stimulation.
  2. CBD (Cannabidiol)
    Non-psychoactive, celebrated for its calming and anti-inflammatory effects.
  3. CBN (Cannabinol)
    A mildly psychoactive byproduct of THC degradation, linked to sedative effects.

Minor cannabinoids: small players, big impact

While THC and CBD dominate, minor cannabinoids play vital roles:

  1. CBC (Cannabichromene)
    May aid in pain relief and mood enhancement.
  2. CBG (Cannabigerol)
    The “stem cell” cannabinoid, noted for antibacterial and neuroprotective properties.
  3. THCV (Tetrahydrocannabivarin)
    May suppress appetite and provide energising effects.

Decarboxylation and heat breakdown

Decarboxylation is the process of converting raw cannabinoids into active forms(like THCA and CBDA into their active forms THC and CBD). But watch the heat—too much can break them down! Here’s what happens as temperatures rise:

Cannabinoid Activation Breakdown Breaks into
THCA THC 105–120°C
221–248°F
157°C +
315°F +
CBN (mildly sedative)
CBDA CBD 105–135°C
315°F +
175°C +
347°F +
CBD Quinones
THC CBN ~157°C
~315°F
220°C +
428°F +
CBN
Terpenes 50–200°C
122–392°F
160°C
320°F
Quickly evaporate
Useful Tip

Keep decarbing steady at 110–120°C (230–250°F) to activate cannabinoids without losing terpenes.

Synthetic cannabinoids

Lab-created cannabinoids like Delta-8 THC differ from natural compounds. Always verify the safety and legality of synthetic products before use.

The role of terpenes

Terpenes are aromatic compounds (essential oils) found in cannabis resin. Beyond their unique scents, terpenes influence how cannabis affects the body.

How they work?

While cannabinoids like THC and CBD are the stars of the show, terpenes are the directors, guiding how those cannabinoids interact with your body, creating distinct effects even in strains with similar THC levels.

Common terpenes and their effects

Terpene Aroma/Flavour Effects Sources
Myrcene Earthy, Musky Sedative, Pain relief Mango, Hops, Thyme
Limonene Citrusy (Lemon, Lime) Mood elevation, Anti-Inflammatory Citrus Rinds, Juniper
Pinene Pine, Woody Focus, Memory retention Pine Needles, Rosemary
Linalool Floral (Lavender) Calming, Anti-anxiety Lavender, Mint
Caryophyllene Spicy, Peppery Anti-Inflammatory, Pain relief Black Pepper, Cloves

Terpenes are central to cannabis’ unique effects. Understanding them enables growers to customise strains for relaxation, focus, or creativity.

The Entourage Effect

Terpenes don’t just make cannabis smell good; they’re part of the entourage effect—the phenomenon where cannabinoids, terpenes, and flavonoids work synergistically, creating a fuller experience.
EXAMPLES:
Myrcene   + THC  = Sedative high.
Limonene + CBD = Uplifting calm.

Frequently asked questions

A recap with plenty of useful information

THCA is the raw, non-psychoactive form of THC that requires heating to activate.

It activates cannabinoids like THC and CBD, making them bioavailable.

Aromatic compounds in cannabis that influence its scent and effects.

No, because cannabinoids in raw cannabis are in their acidic, non-psychoactive forms.

The synergy between cannabinoids, terpenes, and flavonoids that enhances effects.

Myrcene, known for its earthy aroma and sedative effects.

Most do, except for naturally active forms like CBN.

Maintain a cool, dry environment to prevent evaporation.

No, Delta-8 THC is a synthetic variant with milder psychoactive effects.

The ideal decarboxylation temperature is 110–120°C (230–250°F).

Use proper curing techniques, maintain moderate humidity, and avoid excessive heat.

Genetics, light intensity, nutrient availability, and curing methods.

It’s the precursor to major cannabinoids like THCA and CBDA.

They can mimic effects but lack the complexity of the entourage effect.

Yes, it can degrade cannabinoids and evaporate terpenes.

Excess light exposure can degrade terpenes and cannabinoids.

THCV may suppress appetite and provide energizing effects, unlike THC.

Yes, excessive heat can degrade THC into CBN.

Strains like Lemon Haze and Super Lemon OG are high in limonene.

Lab testing using high-performance liquid chromatography (HPLC).