Geraniol: Formula, Family, Boiling Point

Geraniol in nine numbered lines

1. Geraniol belongs to the monoterpenes, the compound family behind the aroma of many plants, and it carries a hydroxyl group, the oxygen-hydrogen pair that makes a molecule an alcohol.
2. Its formula is C10H18O: ten carbon atoms, eighteen hydrogen atoms, one oxygen atom.
3. At normal atmospheric pressure it boils at roughly 230 °C.
4. Our terpene chart gives every entry the same four columns: name, family, scent, approximate boiling point.
5. Whatever sits past those four columns belongs to research that is still developing, so the space stays empty instead of being filled with guesses.
6. How much geraniol a plant carries depends on the cultivar, the growing conditions, the timing of the harvest and the processing afterwards.
7. Move any of those four variables and the figures move with them, batch by batch and product by product.
8. This entry is about the compound as it occurs in plants, not about one bottle from the Cibdol catalogue.
9. Terpenoids alongside cannabinoids were the subject of Russo's 2011 review, which proposed that the plant's compounds may act together rather than one at a time [1].

What the formula pins down

Ten carbons, one oxygen

Monoterpene is a size label before it is anything else. Two five-carbon building blocks, ten carbons in total, and that is the class. Geraniol fits it exactly: C10H18O. The oxygen is the notable part, since plenty of monoterpenes carry none at all. Ten carbons, eighteen hydrogens, one oxygen, arranged in one specific way. That arrangement is what an analysis identifies when it puts a name to a compound in a plant extract, and it is the same molecule whichever plant it came out of.

The part that ends in -ol

The single oxygen sits in a hydroxyl group: one oxygen bonded to one hydrogen, attached to the carbon chain. In chemistry, that group is what makes a molecule an alcohol, and it is why the name ends in -ol. So geraniol carries two correct labels at once. A monoterpene, by carbon count. An alcohol, by functional group. Neither label says anything about what the compound does in a body, and the chemistry column is not where that question gets answered.

Reading the 230 °C line

The condition comes with the number

Roughly 230 °C, and the second half of that sentence carries as much weight as the number itself. Boiling points depend on pressure. Lower the pressure and the same liquid boils cooler, which is why a figure without its condition is only half an entry. Our chart states atmospheric pressure next to the temperature for exactly that reason. It is a physical property of the molecule, measured under named conditions. Nothing in the number describes what the compound does anywhere else.

Approximate, on purpose

Published values differ slightly between sources and methods, so the column says approximate rather than inventing a decimal place. What the figure is good for is orientation: where one compound sits on a temperature scale next to the others in the same table. It is not a setting, a target or an instruction. Name the compound, name its family, note the scent descriptor, give the boiling point with its condition, and stop. Four columns, filled the same way every time.

Four variables, one moving figure

Ask how much geraniol is in a plant and the useful answer starts with four questions. Which cultivar. Grown how, and where. Picked when. Processed by which method. Each one shifts the aromatic profile, and they shift it together, which is why a single number can never stand in for a whole species. Cultivar and growing conditions set the ceiling. Harvest timing decides how much of that is actually present on the day. Processing decides how much survives into the finished extract. That is the reason aroma compounds get read batch by batch and product by product, across the Cibdol catalogue and the CBD oil 2.0 range, rather than copied from a textbook average. Two bottles of the same formula, made from two different harvests, are two different measurements. Both can be accurate. A batch report describes one batch and is honest about nothing wider. Since 2014 the working rule here has not changed: publish what was measured in the material that was actually tested.

Where the published record stands

The chemistry of geraniol is settled. The biology is less so, and that gap is worth saying out loud. Russo's 2011 review [1] set out the idea usually called the entourage effect: the proposal that cannabinoids and terpenoids in the plant may influence each other rather than acting in isolation [1]. It was framed as a hypothesis with supporting signals, not a closed case, and the paper is careful about where its own evidence ends [1]. That is roughly where individual terpenoids sit today. Named, measurable, well described physically. Much less well described in people.

What stays blank on the chart

Name, family, scent, approximate boiling point. Four columns we can print with a straight face. Everything else about one terpenoid, taken on its own and in the amounts a plant actually carries, belongs to developing research, so we say so instead of borrowing certainty from somewhere else. If it is not in the literature, it does not go on the page. That is not caution for its own sake. It is what makes those four columns worth reading.