Phytol: From Chlorophyll to a Boiling Point
Definition
Phytol is a terpenoid: a twenty-carbon diterpene skeleton carrying an alcohol group, and it traces back to chlorophyll, the pigment that makes leaves green. Terpenes and terpenoids together form the aromatic fraction of the cannabis plant, the part responsible for its smell chemistry [1]. The boiling point on record for phytol sits around 204 °C, measured under reduced pressure rather than in open air.
So which family does phytol belong to?
The terpenoids. Half of that answer is already in the name: the ending -ol marks an alcohol, a molecule carrying an oxygen-hydrogen group. That one detail is why chemists file phytol with the terpenoids instead of with the plain hydrocarbon terpenes. Underneath sits a diterpene skeleton, twenty carbons long, and its origin is chlorophyll, the pigment behind leaf green. Terpenes and terpenoids together make up the aromatic fraction of the cannabis plant, and that fraction is where the smell chemistry of the material lives [1]. So phytol keeps company most people have already met by nose, even when the name is new to them.
What the classification pins down, and nothing beyond it:
- A terpenoid rather than a plain terpene, because oxygen is part of the molecule.
- A diterpene backbone, meaning twenty carbon atoms.
- An origin in chlorophyll, the green pigment of plant tissue.
- Membership of the aromatic fraction of the plant described by Russo in 2011 [1].
- A boiling point on record near 204 °C, noted under reduced pressure.
Everything else on this page is either one of those points read more closely, or an honest gap.
Six rows, and what each one covers
| Item | What is on record | What the row leaves open |
|---|---|---|
| Chemical class | A terpenoid: a terpene skeleton carrying an alcohol group, which is exactly what the ending of the name signals. | Classification says nothing about how much of it sits in a given plant or bottle. |
| Backbone size | Twenty carbons, the size chemists call a diterpene. | Size alone does not predict how a molecule behaves once it leaves the leaf. |
| Boiling point | Around 204 °C. | A reduced-pressure figure, so not the number for an open vessel at ordinary atmospheric pressure. |
| Measurement condition | Partial vacuum, stated alongside the temperature. | Drop the condition and the number stops being comparable to anything. |
| Aromatic company | Terpenes and terpenoids form the aromatic fraction of the cannabis plant, its smell chemistry, as set out by Russo in 2011 [1]. | That work describes a fraction of plant material, not a result attributable to phytol on its own [1]. |
| How we write it | Since 2014 the approach has not moved: describe what is measurable, name what is uncertain. | Anything past that stays out of the copy. |
Why that 204 °C carries a condition
A number is only as good as the conditions printed next to it. The boiling point on record for phytol sits around 204 °C, and it arrives with a qualifier: measured under reduced pressure, in a partial vacuum, not in a room at ordinary atmospheric pressure. That qualifier is not a technicality to skip. Lower the pressure above a liquid and it boils cooler. Raise the pressure and the same liquid needs more heat. A vacuum figure and an atmospheric figure are two different numbers for one substance, and swapping them quietly changes the meaning.
A number you cannot move house with
Take the 204 °C out of its vacuum and it stops being an instruction for anything. It is not a setting. Not a threshold, not a target for a hob or a device. It is a laboratory reading, taken at a pressure someone chose and then wrote down. Vacuum distillation exists for that very reason: pulling the pressure down lets a heavy molecule move at a temperature far below what an open flask would demand. When a figure like this travels without its footnote, it usually arrives wrong.
Documented next to still open
| Question | Where it stands | Basis for that status |
|---|---|---|
| Does phytol sit on the aromatic side of the plant? | Yes, as part of the terpene and terpenoid fraction described as the plant's smell chemistry [1]. | Russo, 2011 [1]. |
| Can one scent adjective be pinned on it here? | Left open. Descriptors shift between panels and samples, and the cited work quotes none for this molecule. | Not covered by Russo, 2011 [1]. |
| At what temperature does it boil in an open room? | Open. The value near 204 °C comes with a reduced-pressure condition attached. | The measurement note printed with the figure. |
| Does the name reveal the chemistry? | Partly. The -ol ending marks the alcohol group; the diterpene skeleton is not visible in the name. | Standard chemical nomenclature. |
| How much phytol is in a specific hemp extract? | A question for a batch analysis, never for a chemistry summary. | Certificate of analysis for the individual lot. |
| What does phytol do in people? | Not addressed by the work cited on this page. | Russo, 2011 sits in plant chemistry, not human outcomes [1]. |
Six checks for any phytol figure
- Read the pressure before you read the temperature. A boiling point without its condition is half a measurement, and phytol's 204 °C is a reduced-pressure value taken in a partial vacuum.
- Watch the end of the name. The -ol marks an alcohol group, which is the reason phytol files with the terpenoids rather than with the hydrocarbon terpenes.
- Check the size claim. A diterpene backbone means twenty carbons, and a page that puts a different count on it has lost the thread somewhere.
- Check what the cited work actually covers. Russo's 2011 paper places terpenes and terpenoids as the aromatic fraction of the cannabis plant [1], which is a statement about a fraction of the material, not about one molecule acting alone.
- Ask for the batch, not the essay. Quantities belong on an analysis of a specific lot; a chemistry page describes the molecule and stops there.
- Notice where the writing stops. Ours has stopped in the same place since 2014: measurables described, uncertainty named by its own name.
Frequently Asked Questions
4 questionsWhere in a plant does phytol originate?
Why is the 204 °C figure printed with a note about pressure?
What separates a terpene from a terpenoid?
Would phytol show up on a batch analysis?
About this article
Luke Sholl has been writing about cannabinoids, CBD, and the broader benefits of nature since 2011. His background includes first-hand cannabis cultivation experience spanning the full seed-to-harvest lifecycle across so
This wiki article was drafted with AI assistance and reviewed by Luke Sholl, CBD & wellness writer. Editorial oversight by Joshua Askew.
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.
Last reviewed 29 серпня 2026 р.
References (1)
- [1]Russo, E.B. (2011). Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects. DOI: https://doi.org/10.1111/j.1476-5381.2011.01238.x
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