Is HHC Legal in Montana?

Last reviewed: May 20, 2026

No. HHC (hexahydrocannabinol) is classified as a synthetic marijuana product under Montana law and is banned in all retail channels. The ban took effect May 22, 2023. Smoke shops, gas stations, CBD stores, and licensed adult-use dispensaries cannot lawfully sell HHC in Montana.

Montana cannabis and hemp at a glance

Montana voters legalized adult-use cannabis through Initiative 190 in November 2020. Retail sales started January 1, 2022, under the Department of Revenue Cannabis Control Division (CCD) under MCA Title 16, Chapter 12. The Department of Agriculture licenses industrial hemp cultivation under MCA Title 80, Chapter 18.

HHC is a hydrogenated form of THC produced almost exclusively through chemical conversion from hemp-derived CBD or delta-9 using a hydrogen catalyst. That synthetic production method is what brings HHC inside Montana's synthetic-cannabinoid ban. For the parallel framework on delta-8, see our Montana delta-8 page.

What Montana law says about HHC

HB 948, signed May 22, 2023, and codified at MCA 16-12-117, bars the manufacture, sale, and distribution of synthetic marijuana products in Montana. The statute defines a synthetic cannabinoid to include any cannabinoid produced artificially by chemical synthesis or biosynthesis. The CCD's post-enactment guidance lists HHC explicitly, alongside HHC-O, HHCP, delta-8 THC, delta-10 THC, THC-O acetates, and THCP.

The 2025 Legislature added two further restrictions:

• HB 49 (2025): signed April 7, 2025, caps hemp products at 0.5 mg total THC per serving and 2 mg total THC per package, applying regardless of cannabinoid variant.
• SB 375 (2025): signed and effective May 5, 2025, prohibits the sale of any hemp product containing total delta-9 THC to consumers unless FDA-authorized.

HHC fails the HB 948 synthetic test categorically. Mixed HHC products that contain residual delta-9 from the precursor also fail SB 375.

How enforcement has played out

The CCD published guidance after HB 948 took effect listing HHC, HHC-O, and HHCP among the synthetic cannabinoids covered. Inspections of smoke shops and convenience stores carrying HHC vape carts and edibles have continued since 2023. SB 27 (2025), effective July 1, 2025, broadened CCD authority from "inspect" to "investigate" non-licensed retailers suspected of selling unlawful cannabinoid products.

What this means for retailers selling HHC in Montana

• Do not stock HHC products in any Montana retail channel. There is no licensed lane, including the adult-use dispensary system.
• Audit certificates of analysis on hemp and CBD SKUs for HHC, HHC-O, and HHCP content. The bans extend to these variants by name in CCD guidance.
• If you are a retailer that previously carried HHC, document the date you pulled the line and dispose of remaining inventory through a lawful channel.
• Train staff to refuse HHC vendor pitches that frame the product as Farm Bill compliant hemp or as "non-THC." HHC is a hydrogenated cannabinoid, not a non-cannabinoid.
• Plan now for the federal H.R. 5371 §781 hemp redefinition taking effect November 12, 2026, which removes any residual federal Farm Bill cover for HHC nationwide.

What this means for consumers buying HHC in Montana

HHC is not lawfully sold to consumers in Montana. Out-of-state shipments are subject to interception. HHC produces effects similar to delta-9 THC, and its metabolites overlap with delta-9 metabolites on standard urine, saliva, and hair drug tests.

Pending federal change

The biggest near-term shift for HHC is federal. H.R. 5371 §781, signed November 12, 2025, explicitly excludes synthetic and chemically converted cannabinoids from the federal hemp definition. HHC is produced almost exclusively through hydrogenation of hemp-derived CBD or delta-9, which places it squarely inside the excluded category. The provision takes effect November 12, 2026, aligning federal law with Montana's existing ban.

Frequently asked questions

Is HHC legal in Montana in 2026?
No. HB 948 (2023), codified at MCA 16-12-117, bars synthetic marijuana products including HHC.

What is HHC?
HHC is hexahydrocannabinol, a hydrogenated form of THC produced through chemical conversion from hemp-derived CBD or delta-9.

Can I buy HHC at a Montana dispensary?
No. The HB 948 synthetic cannabinoid ban excludes HHC from the licensed adult-use category as well.

Does HHC show up on a drug test?
HHC metabolites overlap with delta-9 THC metabolites on most standard tests and can trigger a positive. Some specialty panels may distinguish them but are uncommon.

Can I order HHC online to Montana?
No. Consumer sales are prohibited and out-of-state shipments are subject to interception.

How does HHC compare to delta-8 in Montana?
Both are produced through chemical conversion from hemp-derived CBD and both are barred under HB 948. See our Montana delta-8 page.

What changes November 12, 2026?
The federal hemp redefinition in H.R. 5371 §781 excludes synthetic cannabinoids from the federal hemp definition, aligning federal law with Montana's existing ban.

This page is provided for informational purposes by ComplyAssistAI LLC and is not legal advice. Hemp and cannabis law in Montana changes frequently. For business compliance questions, consult a Montana-licensed cannabis attorney. Find one in our Cannabis Lawyer Directory.