What hemp-derived THC is
Hemp-derived THC is tetrahydrocannabinol taken from hemp. Federal law defines hemp as Cannabis sativa L. and any part of the plant with a delta-9 THC concentration of 0.3 percent or less on a dry weight basis. The 2018 Farm Bill removed hemp from the Controlled Substances Act schedule for marijuana.
The label covers several molecules:
- Delta-9 THC, the main psychoactive compound in cannabis.
- Delta-8 THC, an isomer of delta-9.
- Delta-10 THC and THC-O.
- HHC (hexahydrocannabinol) and THCP.
Delta-8 THC occurs in the plant at low levels, under 1 percent. Most delta-8 in stores is made in a lab. Producers start with CBD, add a solvent and an acid catalyst, and convert CBD to delta-8. That process makes the molecule a synthetic derivative under some readings of federal law.
Federal status
The 2018 Farm Bill language names delta-9 THC only. It sets no limit on delta-8 THC by name. DEA has stated that cannabinoids produced by synthetic conversion do not qualify for the hemp exemption. FDA has not approved any hemp-derived THC product as a drug or a supplement. FDA has approved one CBD drug, Epidiolex, and two synthetic THC drugs, dronabinol and nabilone.
As of 2025, short-term spending laws extended the 2018 Farm Bill. Congress has not passed a federal cap on total THC isomers.
State law decides most of the market. Some states ban hemp-derived THC outright. Others set caps per serving and per package, and those caps differ by state. Rules change each legislative session. Check your state statute and the product COA before you buy.
Products and doses
Hemp-derived THC ships as gummies, tinctures, vape cartridges, and drinks. Package labels run from 5 mg to 50 mg per unit. No federal serving standard exists, so two products with the same number can act in different ways.
- Inhaled: effects start in 1 to 5 minutes.
- Edible: onset in 30 to 90 minutes. Peak at 2 to 4 hours. Effects can last 6 to 12 hours.
Start at 1 mg to 2 mg of THC with no tolerance. Wait two hours before a second dose.
Tests and label accuracy
A certificate of analysis (COA) comes from a third-party lab. A COA that matters lists:
- Potency for delta-8, delta-9, THCA, CBD, and total THC by HPLC.
- Residual solvents, such as hexane, heptane, and toluene.
- Pesticides, heavy metals, and microbials.
- Batch number and test date.
Lab surveys of delta-8 products have found THC amounts above and below the label claim. Some samples held no delta-8 at all. Match the batch number on the COA to the batch number on the package.
Drug tests
Standard urine immunoassays screen for 11-nor-9-carboxy-THC, a metabolite of delta-9 THC. Delta-8 THC breaks down into the same metabolite. A delta-8 gummy can cause a positive result. CBD isolate alone does not, but full-spectrum hemp oil can carry trace THC.
Risks and unknowns
FDA has issued warnings on delta-8 THC products, with reports of hallucinations, vomiting, and tremors. CDC data show a rise in poison center calls for delta-8 exposures in children after 2021. Long-term safety data for delta-8, delta-10, HHC, THCP, and THC-O do not exist. No human trials cover these compounds.