Delta 8 vs delta 9: differences, potency and status in France
By the Golden High teamUpdated 23 October 20268 min read
Molecules
Delta 8 vs delta 9: delta 8 (Δ8-THC) is an isomer of delta 9, the classic THC in cannabis, with the same formula but a double bond sitting one notch further along the molecule, which makes it roughly two-thirds as potent according to a human comparison carried out in 1973. In France, both remain outside the legal framework: delta 8 is a tetrahydrocannabinol, a family listed as a controlled drug. Here's what really separates them, where commercial delta 8 comes from, and what health authorities have observed.
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Delta 8 vs delta 9, two isomers of THC.
When people say "THC" without specifying, they mean delta-9-tetrahydrocannabinol, or delta 9: the main molecule behind cannabis's psychoactive effect, the one lab tests measure and regulations target. Delta-8-tetrahydrocannabinol, or delta 8, is its close cousin: both molecules have exactly the same atoms, put together in almost the same way.
That's what chemists call isomers: same chemical formula, slightly different structure. And in pharmacology, "slightly" can be enough to change how strong an effect is. If you want to brush up on the basics of classic THC first, our article What is delta 9? sets the scene.
The chemistry, simply
A double bond shifted one notch.
Chemists number the carbon atoms in the molecule. The number in the name shows where a double bond sits in one of the rings: between carbons 9 and 10 for delta 9, between carbons 8 and 9 for delta 8. That's the only difference.
Delta 9 (Δ9-THC)
Double bond between carbons 9 and 10. Strong affinity for the brain's CB1 receptor, which carries most of the psychoactive effect. Dominant in cannabis, in acid form (THCA) before heating.
Delta 8 (Δ8-THC)
Double bond between carbons 8 and 9. It binds to the same CB1 receptor, but with lower affinity, which explains its lower potency. Only present in trace amounts in the plant.
This small shift changes how the molecule fits into the CB1 receptor. Both are partial agonists of this receptor, with very similar effect profiles. We explain the role of this receptor in CB1, CB2: the receptors that drive your experience.
THCA, on the other hand, is neither delta 8 nor delta 9: it's the acid form the plant produces, which turns into delta 9 when heated. In France, it was added to the list of controlled drugs by the ANSM (the French medicines agency) in June 2024.
Where it comes from
A lab product, born from surplus CBD.
The plant only produces tiny amounts of it: there's no way to extract enough to fill shelves. Commercial delta 8 is therefore almost always made from CBD extracted from hemp, through a chemical reaction (an acid-catalysed isomerisation) that closes one of the molecule's rings. The US FDA points out that this conversion uses potentially harmful chemicals and can leave by-products in the final product.
1966
Delta 8 is identified naturally in cannabis, at a much lower concentration than delta 9.
1973
First comparison in humans: six volunteers receive one molecule or the other, orally and intravenously.
2018
In the US, the Farm Bill revives hemp farming without explicitly mentioning delta 8. CBD becomes plentiful and cheap.
Late 2020
Delta 8 has become a flagship product for US hemp processors, especially where delta 9 remained banned.
May 2022
The FDA publishes its "5 things to know" about delta 8 and lists the adverse effects reported.
What the sources say
Less potent, not less psychoactive.
You often read that delta 8 is a "light" or "legal" THC. The data says otherwise: it's a psychoactive molecule, just slightly less potent at the same dose. Here are the most solid benchmarks.
Hollister & Gillespie · 1973
The only published head-to-head comparison in humans: across six volunteers, delta 8 was about two-thirds as potent as delta 9, with a qualitatively similar experience. A tiny sample, but it's still the reference cited today.
British Journal of Pharmacology · 2022
A review of all the comparative studies concludes that the pharmacokinetics and pharmacodynamics of delta 8 and delta 9 are very close, and that delta 8's lower potency comes down to a lower affinity for the CB1 receptor.
FDA · 2022
The US agency received 104 adverse event reports between December 2020 and February 2022: hallucinations, vomiting, tremors, anxiety, dizziness, confusion, loss of consciousness. 55% required an intervention or a hospital stay.
US poison control centres · 2021-2022
2,362 delta 8 exposures recorded between January 2021 and February 2022, 41% of them in under-18s. 40% were accidental exposures, mostly affecting children.
Remember this: "two-thirds of the potency" doesn't mean "no effect". A double dose of delta 8 can produce the effect of a normal dose of delta 9. Full references at the bottom of the page.
The legal framework
Delta 8 in France: outside the legal framework.
The French list of controlled drugs (order of 22 February 1990) includes in its annex IV the "tetrahydrocannabinols, their esters, ethers, salts", in the plural. Delta 8 is a tetrahydrocannabinol, like delta 9: in France it therefore falls under the same rules as THC.
The tolerance granted to hemp doesn't change that. The French order of 30 December 2021 allows industrial and commercial use of hemp varieties whose delta-9-THC content doesn't exceed 0.3%, and sets the same ceiling for extracts and products containing them. It's a tolerance for natural traces, not permission to make THC from CBD.
Key takeaway: a product sold in France as "delta 8" or "Δ8-THC" has no place within the legal framework, however it's presented. The related "neo-cannabinoids" (HHC, THCP, THCA, H4-CBD…) were in fact classified as controlled drugs by the ANSM in 2023 and 2024.
To see how these molecules compare with one another, read our HHC, THC, THCP and Delta-P comparison, and for the acid form of THC, our article What is THCA?.
Head to head
Delta 8, delta 9, Delta-P: three situations.
| Delta 9 (THC) | Delta 8 | Delta-P (Golden High) | |
|---|---|---|---|
| Nature | Major cannabinoid in cannabis | THC isomer, traces in the plant | CBDX-based range, under 0.3% THC |
| Product origin | The plant | Chemical conversion of CBD | Lab-tested flowers and resins |
| Potency | Benchmark | About two-thirds of delta 9 (1973) | Stronger than CBD |
| Status in France | Controlled drug (tolerated under 0.3% in hemp) | Outside the legal framework | Products sold in our shop |
| Traceability | — | Possible synthesis by-products | Level stated on every product |
Delta-P is neither delta 8 nor delta 9: it's the name of our range, based on CBDX. How it works and its framework are explained on our dedicated Delta-P page.
So, in practice?
Products with a stated level.
The delta 8 story looks a lot like HHC's: a lab molecule, sold as a "legal" alternative to THC, mass-produced from CBD, with no control over what's left in the bottle. We made a different choice: flowers and resins from the Delta-P range, under 0.3% THC, with a stated level and a lab analysis.
To start, Amnesia Delta-P 12 % is our flower with the most moderate level. To compare several profiles without buying large quantities, the Pack High brings together three strains. The whole range is in the Delta-P flowers collection.
Check the level
A serious product states its cannabinoid levels and stays under 0.3% THC.
Ask for the analysis
Every batch should be traceable to a certificate of analysis from a laboratory.
Start low
Small amount, moderate level, time between uses. Adults only, and never before driving.
Your questions
What people ask us about delta 8.
Is delta 8 legal in France?
No. Delta 8 is a tetrahydrocannabinol, a family on the French list of controlled drugs (annex IV of the order of 22 February 1990). In France it falls under the same rules as THC and has no place within the legal framework.
Delta 8 vs delta 9: what's the difference?
A single double bond, between carbons 8 and 9 in delta 8, between carbons 9 and 10 in delta 9. The result: lower affinity for the CB1 receptor and lower potency, with qualitatively similar effects.
Delta 8 or delta 9: which is stronger?
Delta 9. The only direct comparison in humans, in 1973, put delta 8 at about two-thirds of the potency of delta 9.
Does delta 8 get you high?
Yes. It's a psychoactive molecule that acts on the same receptors as THC. The FDA recorded hallucinations, anxiety, confusion and loss of consciousness among the adverse effects reported.
Is delta 8 natural?
It exists in the plant, but only in trace amounts. Commercial delta 8 is almost always made from CBD through a chemical reaction, which can leave by-products.
What is delta-9?
It's delta-9-tetrahydrocannabinol, "classic" THC: the main psychoactive molecule in cannabis. In France it's a controlled drug; hemp is tolerated under 0.3% delta-9-THC.
Is Delta-P the same as delta 8?
No. Delta-P is the name of our range, based on CBDX, under 0.3% THC. It's neither delta 8 nor delta 9. Everything is explained on our dedicated Delta-P page.
Sources
The references cited in this article.
- Kruger J.S., Kruger D.J., Journal of Cannabis Research (2022). Delta-8-THC: Delta-9-THC's nicer younger sibling?.
- Tagen M., Klumpers L.E., British Journal of Pharmacology (2022). Review of delta-8-tetrahydrocannabinol (Δ8-THC): Comparative pharmacology with Δ9-THC.
- Hollister L.E., Gillespie H.K., Clinical Pharmacology & Therapeutics (1973). Delta-8- and delta-9-tetrahydrocannabinol comparison in man by oral and intravenous administration.
- U.S. Food and Drug Administration (2022). 5 Things to Know about Delta-8 Tetrahydrocannabinol – Delta-8 THC.
- Légifrance. Order of 22 February 1990 setting the list of substances classified as controlled drugs (in French).
- Légifrance. Order of 30 December 2021 applying article R. 5132-86 of the French public health code (in French).
- ANSM (2024). The ANSM adds new cannabinoids to the list of controlled drugs (in French).
