Is Delta-10 THC Legal in New Hampshire?

Last reviewed: May 21, 2026

No. Delta-10 THC is not authorized for retail sale in New Hampshire. RSA 439-A:4, added by HB 611 (Chapter 237, Laws of 2023) and effective October 7, 2023, says the hemp chapter does not authorize the sale of products derived from hemp containing natural or synthetic THC greater than 0.3 percent on a dry weight basis in any formulation, including delta-8 THC, delta-9 THC, or any other THC isomer variant. Delta-10 is a THC isomer variant. Attorney General John Formella has joined multistate efforts urging Congress to close the federal intoxicating hemp loophole.

New Hampshire Cannabis and Hemp Overview

New Hampshire operates the Therapeutic Cannabis Program under RSA 126-X, originally created by HB 573 in 2013. HB 1278 (2024), signed August 2, 2024 and effective October 1, 2024, expanded eligibility to any debilitating or terminal condition for patients 21 and older with a practitioner certification. The Department of Health and Human Services administers the program.

Adult-use cannabis is not legal. HB 1633 (2024) cleared both chambers in different forms and died in conference. HB 198 (2025) passed the House 208-125 in March 2025 and was tabled by the Senate in May 2025. Governor Kelly Ayotte has signaled she would veto legalization.

The hemp framework lives under RSA 439-A. HB 459 (2019) created the chapter. HB 611 (2023) added RSA 439-A:4. The Department of Agriculture, Markets and Food administers hemp registration.

What New Hampshire Law Actually Says About Delta-10

RSA 439-A:1 defines hemp using the federal delta-9-only standard at 0.3 percent dry weight. RSA 439-A:4 then closes the door on intoxicating hemp products, naming delta-8 THC and delta-9 THC and then sweeping in any other THC isomer variant. Delta-10 fits squarely inside the isomer variant category. Most commercial delta-10 is produced through hydrogenation or acid-catalyzed isomerization of hemp-derived CBD or delta-9, and the statute captures natural and synthetic THC alike.

RSA 318-B (Controlled Drug Act) treats delta-10 THC as a Schedule I controlled substance to the extent it falls outside the hemp definition. RSA 318-B:2-c decriminalizes personal possession of three-quarters of an ounce or less of marijuana as a violation, but that statute does not authorize commercial sale of hemp-derived THC isomers.

How Enforcement Has Played Out

Enforcement at hemp retail has been uneven. Some vape shops and convenience stores continue to stock delta-10 product. The Attorney General has been active in multistate efforts urging Congress to close the federal loophole, which reinforces the state interpretation that intoxicating hemp products fall outside RSA 439-A. Local enforcement has focused on sales to minors and packaging that mimics candy.

What This Means for Retailers Selling Delta-10 in New Hampshire

• RSA 439-A:4 captures delta-10 through the "any other THC isomer variant" language.
• Discontinue delta-10 SKUs to align with the express statutory text and avoid Controlled Drug Act exposure.
• Verify ID at point of sale. Sales to minors have been the most consistent enforcement priority.
• Track federal H.R. 5371 §781 effective November 12, 2026. Delta-10 loses any remaining federal Farm Bill cover on that date.
• Pull packaging that mimics marijuana branding or candy. This has been the most consistent enforcement trigger nationally.

What This Means for Consumers Buying Delta-10 in New Hampshire

Delta-10 is not authorized for retail sale under RSA 439-A:4. Some stores stock it anyway. Out-of-state online retailers continue to ship delta-10 products to New Hampshire addresses under federal Farm Bill cover. Delta-10 produces effects similar to delta-9 THC and metabolites overlap with delta-9 metabolites on standard urine drug tests.

Pending Federal Change

The biggest near-term shift for delta-10 is federal. H.R. 5371 §781, signed November 12, 2025, explicitly excludes synthetic and chemically converted cannabinoids from the federal hemp definition. Delta-10 is produced through chemical conversion of hemp-derived CBD or delta-9, which places it squarely inside the excluded category. The provision takes effect November 12, 2026. After that date, delta-10 loses any remaining federal Farm Bill protection. New Hampshire already restricts the product under RSA 439-A:4, so the federal change tightens the practical reality.

Frequently Asked Questions

Is delta-10 THC legal in New Hampshire in 2026?
No. RSA 439-A:4 captures delta-10 as a THC isomer variant above 0.3 percent in any formulation.

What is the statute?
RSA 439-A:4, added by HB 611 (Chapter 237, Laws of 2023), effective October 7, 2023.

What is delta-10 THC?
An isomer of delta-9 THC, produced almost exclusively through hydrogenation or acid-catalyzed conversion from hemp-derived CBD or delta-9.

Does delta-10 show up on a drug test?
Delta-10 metabolites overlap with delta-9 metabolites on most standard tests and trigger a positive.

What changes November 12, 2026?
The federal hemp redefinition excludes synthetic cannabinoids. Delta-10 loses federal Farm Bill cover.

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