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Massachusetts THC Ban (2026): 3 of 9 Banned, Full List

Partial ban

As of November 12, 2026, Massachusetts bans 3 of 9 tracked THC compounds at retail. Banned: THCa, HHC (capsule / tablet) and THC-O Acetate. Restricted or gray: Delta-8 THC, Delta-9 THC (vape / inhalable), THCP, THCV, Delta-10 THC and HHC-P.

Each row below links to the determination with the controlling law verbatim.

Latest update September 23, 2026: HHC in Massachusetts: Status changed from illegal to restricted. Change history

When does the Massachusetts THC ban take effect?

No THC ban effective date is pending in Massachusetts as of November 13, 2026. Most of the federal hemp redefinition takes effect December 11, 2026. A narrower piece, covering cannabinoids the plant cannot naturally produce, started November 12, 2026.

Watchenforcement date in 28 days (H.R. 6500 (Pub. L. 119-103) / Pub. L. 119-37 Sec. 781); recent bill or agency activity

in 28 days December 11, 2026
Delta-8 THC: 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.
October 21, 2026
Delta-9 THC: HR 4963: Marijuana 1-to-3 Act of 2025
Federal · Bill activity
Introduced in House (2025-08-12)
took effect November 12, 2026
THC-O Acetate: Federal hemp redefinition, Nov 12 slice: THC-O acetate, which the plant cannot produce, leaves 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)). THC-O acetate is made only by acetylating THC outside the plant, so products containing it leave the federal hemp definition on Nov 12, 2026 and fall in the Schedule I tetrahydrocannabinols listing.
took effect November 12, 2026
HHC-P: 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.

Every tracked THC compound in Massachusetts

Compound	Status	Headline	Effective
Delta-8 THC	Restricted	Delta-8 restricted (agency policy): named synthetic-THC prohibition	2022-12-12
Delta-9 THC (vape / inhalable)	Gray area	Hemp Delta-9 vape - restricted
THCa	Illegal	THCA flower illegal outside licensed marijuana retail in Massachusetts: the hemp definition counts THCA (combined delta-9 THC and THCA at or under 0.3%)	2019-06-12
THCP	Restricted	THCP restricted (agency policy): synthetic-THC prohibition	2024-04-03
THCV	Restricted	Flavored vapor products banned regardless of nicotine: G.L. c.270 s.28(b)
HHC (capsule / tablet)	Illegal	Federally scheduled (schedule_i eff. 2026-05-04) · state law: gray
Delta-10 THC	Gray area	Delta-10 THC restricted (agency policy): MDAR names THC10 among prohibited synthetic THC; no statute names it
THC-O Acetate	Illegal	Federally scheduled (schedule_i eff. 2026-11-12) · state law: gray
HHC-P	Gray area	HHC-P restricted (agency policy): MDAR bars synthetically derived cannabinoids; no Massachusetts statute names it

Recent changes in Massachusetts

2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from illegal to restricted.
2026-09-23HHC (Hexahydrocannabinol): Status changed from restricted to illegal.
2026-09-23HHC (Hexahydrocannabinol): Status changed from restricted to illegal.
2026-09-23HHC (Hexahydrocannabinol): Status changed from restricted to illegal.

Nearby

Connecticut THC ban partial ban
New Hampshire THC ban partial ban
New York THC ban partial ban
Rhode Island THC ban partial ban
Vermont THC ban partial ban

THC ban in every state · All compounds in Massachusetts · Federal hemp ban: what changes Nov 12 and Dec 11

Cite this page

Compound Analytics. "Massachusetts THC Ban (2026): 3 of 9 Banned, Full List." Compound Laws, https://compoundlaws.com/bans/thc/massachusetts/. Accessed November 13, 2026.

Compound Laws, published by Compound Analytics, reports the record: statutes verbatim, official citations, enforcement facts and verification dates. Nothing here is legal advice and nothing here describes how to get around a law. A jurisdiction with no verified row is reported as not yet verified, never as legal. Found an error? Corrections policy.

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