What is THC-P?
THC-P is short for tetrahydrocannabiphorol. It is a phytocannabinoid, a compound the cannabis plant makes. Chemists call the common form delta-9-THCP. The molecule is a close relative of delta-9 THC. One difference sits on the side chain: THC-P has seven carbons, delta-9 THC has five.
A team led by Cinzia Citti at the University of Modena and Reggio Emilia identified THC-P in Cannabis sativa in 2019. The same paper reported that THC-P binds the CB1 receptor with an affinity about 33 times that of delta-9 THC in their assay.
How potent is it in people?
Receptor affinity is not human potency. The 33x number comes from lab binding tests, not from dosing studies in people. No controlled human trial has measured THC-P dose response, effects, or safety.
User reports describe effects that resemble delta-9 THC: relaxation, altered perception, dry mouth, and a faster heart rate. Many users report a stronger effect per milligram. Those reports are anecdotal and unverified.
Where does THC-P come from?
The plant makes THC-P at trace levels. Flower samples tested so far show concentrations in the parts-per-million range. Extracting THC-P from flower at those levels is not practical.
Most THC-P sold in stores is semisynthetic. Manufacturers start with CBD or delta-9 THC, then run chemical reactions to attach the seven-carbon chain. Purity depends on the reaction and the cleanup steps. A third-party certificate of analysis lists the THC-P percentage plus any leftover solvents, reagents, or byproducts.
Legal status in the United States
The 2018 Farm Bill defined hemp as cannabis with delta-9 THC at or below 0.3 percent on a dry weight basis. THC-P is not delta-9 THC, so sellers argue hemp-derived THC-P sits outside that cap. Courts and federal agencies have not settled the question.
State law varies. Some states ban intoxicating hemp cannabinoids by name. Others cap total THC per package. A product legal in one state can be illegal in the next. Check the rules of the state where you buy and the state where you plan to use it.
What to check before you buy
- A certificate of analysis from a third-party lab, dated within the last few months.
- Total THC-P in milligrams per unit, not just a percentage.
- Test results for residual solvents, heavy metals, pesticides, and microbials.
- The license number of the seller or the manufacturer.
The FDA has not approved any THC-P product for any use. There is no established dose. Start low and note that onset time and duration are not documented in clinical data. At Eden Cannabis, staff can pull the certificate of analysis for each THC-P item on the shelf.