Pick First: Hemp CBD With Delta-9 THC at or Below 0.3%
A buyer who wants a hemp product with the fewest legal questions should pick a CBD item from a seller that posts a batch COA. The COA needs a delta-9 THC result at or below 0.3% on a dry weight basis. That number comes from the 2018 Farm Bill. It marks the line between hemp and marijuana under federal law.
THCA flower does not sit on that line. THCA occupies a gray zone. Federal agencies have shifted their reading of it. State legislatures have moved against it. A COA for THCA flower often lists total THC, which counts THCA after it converts.
THCA and THC: One Molecule, Two Forms
THCA is tetrahydrocannabinolic acid. It is the form that appears in the live cannabis plant. THC is delta-9 tetrahydrocannabinol. Heat strips a carboxyl group from THCA. THC is the result.
Smoking, vaping, dabbing, or baking THCA flower drives that conversion. Raw THCA does not produce the psychoactive effect that THC produces. A label that says THCA is not a promise about the effect after combustion.
Federal Legal Status
- Hemp: Legal under 7 U.S.C. 1639o when delta-9 THC measures 0.3% or less on a dry weight basis.
- Marijuana: Schedule I under the Controlled Substances Act.
- THCA: Not named in the CSA schedules. DEA correspondence in 2023 said THCA is not a controlled substance. Later DEA statements left the question open. No court has settled it.
- CBD: Legal when it comes from hemp. FDA has not approved CBD as a food ingredient or a dietary supplement ingredient.
State Legal Status
States write their own rules for hemp cannabinoids. Some states ban THCA outright. Others count THCA toward a total THC cap. States with restrictions on THCA or total THC include Arkansas, Louisiana, Texas, and Virginia. Bills move each session. Check the state agriculture department or health department page before a purchase.
Federal law and state law can disagree. A product that passes the 0.3% federal test can still be illegal in the state where it ships. Shipping across state lines adds a second layer.
Options, Ranked by Legal Risk
- CBD isolate. THC is removed. A lab test shows one compound. Lowest risk.
- Broad-spectrum CBD. THC is removed, other cannabinoids stay. Low risk.
- Full-spectrum hemp CBD. Delta-9 THC stays under 0.3%. Legal under federal law. State caps on milligrams per package vary.
- THCA flower. Banned in several states. Converts to THC when heated. Highest risk.
What to Check on a COA
- Batch number and test date.
- Delta-9 THC percentage on a dry weight basis.
- Total THC. The formula adds THCA multiplied by 0.877 to delta-9 THC.
- Third-party lab name and accreditation.
- Pesticide, heavy metal, residual solvent, and microbial panels.
Ask the seller for the COA that matches the batch in your hand. A COA for a different batch is not proof. If the test result is missing, treat the legal status as unknown.