I'm not advocating any of this for the record.
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chatgpt:
here are the main hemp‑based cannabinoids and “THC‑like” products you’ll commonly see marketed.
THCA (tetrahydrocannabinolic acid)
The non-psychoactive precursor to delta-9 THC; becomes THC when heated (decarboxylates).
Often found in raw hemp extracts; legal in many places if derived from hemp, but check local rules.
Delta-9 THC (Δ9-THC) from hemp
The classic psychoactive component. In hemp products, it’s legal federally only if the product complies with the hemp definition (usually ≤0.3% Δ9 in the product by weight). Many states restrict or ban hemp products containing Δ9 above certain thresholds or in any form.
Delta-8 THC (Δ8-THC)
A hemp‑derived isomer of THC with somewhat milder effects for many users.
Legality is highly state-specific; several states have banned or restricted Δ8.
Delta-10 THC (Δ10-THC)
Another hemp‑derived isomer; effects are typically milder and somewhat different from Δ8/Δ9.
Legality varies by state; not legal everywhere.
THCP (tetrahydrocannabiphorol)
A more potent hemp‑derived cannabinoid that’s recently shown up in products.
Legal status is uncertain and highly state‑dependent; many places haven’t specifically legalized or banned it.
THCB (tetrahydrocannabutol)
A shorter/alternative THC‑like cannabinoid found in some products.
Very position-specific in law; check local rules.
THCH (tetrahydrocannabinol; sometimes marketed as a longer‑chain THC analog)
Marketed in some outlets as a THC analogue; legality is uncertain and varies by jurisdiction.
THC-O acetate (THC-O, sometimes called THCO)
A synthetic prodrug of THC (THC-O acetate); often reported as very potent.
Legality is unclear in many places and several states have moved to ban or regulate it.
HHC (hexahydrocannabinol)
A hydrogenated form of THC; marketed in many hemp shops.
Federal legality is ambiguous; many states have or are passing restrictions.
HHC-O (acetylated HHC)
A more potent, acetylated form of HHC.
State laws vary; check local regulations.
THCV (tetrahydrocannabivarin)
A distinct cannabinoid sometimes listed in “THC” products; psychoactivity is different and usually milder.
Not a form of delta-9, but often included in hemp product lines.
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additional reading
https://en.wikipedia.org/wiki/Hemp_Farming_Act_of_2018