As of November 12, 2026, HHC-P is banned from retail sale in Missouri, effective November 12, 2026. HHC-P: from November 12, 2026, a cannabinoid not produced by the plant, marijuana-channel only at any amount (RSMo 195.900.11(1)(a)a-b).
The Missouri HHC-P ban is already in force (effective November 12, 2026); no further effective date is pending.
Watchenforcement date in 28 days (H.R. 6500 (Pub. L. 119-103) / Pub. L. 119-37 Sec. 781)
in 28 days Federal hemp redefinition, Dec 11 piece: total THC 0.3% and 0.4 mg total THC per container Federal · Enforcement date · H.R. 6500 (Pub. L. 119-103) / Pub. L. 119-37 Sec. 781 Pub. L. 119-103 (continuing resolution, Sept 2, 2026) delayed the rest of the Pub. L. 119-37 sec. 781 hemp definition to Dec 11, 2026 (CRS IF13136, Sept 28, 2026): hemp is measured by total tetrahydrocannabinols including THCA (0.3% dry weight), and any final product over 0.4 mg combined total THC and cannabinoids with similar effects per container leaves hemp. A product that leaves hemp is marijuana, Schedule I, in every state.
took effect Federal hemp redefinition, Nov 12 slice: cannabinoids the plant cannot produce, including HHC-P, leave hemp Federal · Enforcement date · H.R. 5371 (Pub. L. 119-37, Sec. 781) Pub. L. 119-103 sec. 2019 (Sept 2, 2026): until Dec 11, 2026 the Pub. L. 119-37 sec. 781 amendments apply only to products with cannabinoids not capable of being naturally produced by a Cannabis sativa plant (7 U.S.C. 1639o(1)(C)(ii)(I) and (iv)(I)). HHC-P is not reported as produced by the plant, so on that reading products containing it leave the federal hemp definition on Nov 12, 2026. FDA's list of plant-producible cannabinoids, due Feb 10, 2026, is still unpublished.
took effect Intoxicating Cannabinoid Control Act, RSMo 195.900 Missouri · Effective date · HB 2641 (2026) Tier 1 (195.900.11(1)(a)) becomes marijuana-only, no contingency: synthesized or non-natural cannabinoids (HHC, converted D8, THCP, EPN class), THCA smokable flower or bud, solid edibles with hemp D9 above natural plant concentration. Manufacturing, testing, transportation and retail sale reserved to Article XIV licensees statewide; $5,000 per unit sold plus class D felony; AG has primary enforcement. No grandfathering or sell-through. Zero-THC products (0.4 mg or less total THC per container, no synthesized cannabinoids) are outside the mandate per the State’s litigation position, ambiguous on the literal text. See law text RSMo 195.900 in the state drawer. The separate federal-timing provision can apply to beverages with naturally produced cannabinoids that do not meet a tier 1 criterion; beverages containing synthesized cannabinoids can be tier 1. Under the current federal extension, products outside tier 1 are generally deferred to December 11, 2026, subject to the statute's federal-contingency condition.
Compound Analytics. "Missouri HHC-P Ban (2026): In Force." Compound Laws, https://compoundlaws.com/bans/hhcp/missouri/. Accessed November 13, 2026.
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