You're looking at a lab report. The cannabinoid breakdown shows 95.6% Δ8-THC. But the big number at the top says "Total Δ9-THC: 0.79%." That's not a typo. Those numbers are both correct. They're just measuring different things.
Let's untangle it.
Delta-8 in plain English
Delta-8-tetrahydrocannabinol (Δ8-THC) is a cannabinoid that occurs naturally in cannabis. But "naturally" is doing a lot of work in that sentence. In the actual plant, Delta-8 shows up in trace amounts, usually less than 1%. Nobody's growing Delta-8 flower.
The Delta-8 you see on shelves is almost always semi-synthetic. Producers take CBD extracted from hemp, then use chemical conversion (acid catalysis, usually) to rearrange it into Delta-8 THC. Same atoms. Different structure. Different compound.
The "8" in Delta-8 and the "9" in Delta-9 refer to where a double bond sits on the molecule's carbon chain. One position apart. That's it. But that one position changes how the molecule fits into your brain's CB1 receptors, which changes how it feels.
How it compares to Delta-9
Delta-9 THC is the compound most people mean when they say "THC." It's the main psychoactive ingredient in cannabis. Delta-8 is its quieter sibling.
Users generally report Delta-8 as roughly half to two-thirds the intensity of Delta-9. Less head fog, less anxiety, more functional. The phrase you'll hear a lot is "clear-headed high."
Fair warning: most of that is anecdotal. There's limited clinical research on Delta-8 specifically. The early data supports what users report (lower binding affinity at CB1 receptors), but we're a long way from rigorous dose-response studies. Take the "milder and calmer" claims seriously but not scientifically.
Why the lab report looks weird
This is where it gets confusing, and where OpenCOA tries to help.
When a COA says "Total THC," it's using a specific formula defined by New York State regulations:
Total THC = (THCA × 0.877) + Δ9-THC
That formula was written for traditional cannabis. It counts the THC precursor (THCA, which converts to THC when heated) plus whatever Delta-9 is already active. It does not count Delta-8. Or Delta-10. Or any other isomer.
So when you see a product that's 95% Delta-8 THC but shows "Total THC: 0.79%," the math is working correctly. That 0.79% is the Delta-9 content only. The formula just wasn't designed for this situation.
On OpenCOA, we label this "Total Δ9-THC" instead of "Total THC" to make the distinction obvious. And the individual cannabinoid breakdown shows every compound the lab detected with its own percentage. No hiding, no confusion. You see what the lab saw.
The legal picture
New York State
NYS banned Delta-8 THC outright. The Department of Health recognized early that the "hemp loophole" (if it comes from hemp and has less than 0.3% Delta-9, it's legal) was being used to sell intoxicating products without any of the testing, labeling, or licensing that regulated cannabis requires.
If you're buying Delta-8 products in New York, they aren't going through the state's cannabis testing and compliance framework.
The federal shift coming November 2026
In November 2025, Congress passed the Continuing Appropriations Act (P.L. 119-37, Section 781). It rewrites the federal definition of hemp, and it's a big deal. The changes take effect November 12, 2026.
Here's what it does:
The definition of "Total THC" expands to include all intoxicating isomers. Not just Delta-9. Delta-8, Delta-10, HHC, all of them. Final products will be capped at 0.4mg total THC per container. For context, that's basically zero. A low-dose THC gummy is typically 2.5–5mg.
Commercially produced Delta-8 gets reclassified as Schedule I. The FDA has 90 days to publish lists of which cannabinoids are naturally occurring versus synthetic.
This effectively ends the legal hemp-derived Delta-8 market nationwide. The 15 states that already banned it were ahead of the curve. The states where it's currently legal with few restrictions (Florida, Texas, Georgia, and others) will see those markets close.
The testing problem nobody talks about
Even if you trust the product, there's a measurement problem.
Delta-8 and Delta-9 THC can co-elute on standard HPLC testing methods. In plain English: the lab equipment can confuse the two compounds because they look similar in the analysis. Standard methods sometimes can't fully separate them.
What does that mean in practice? One study using improved separation methods found that "compliant" Delta-8 products (sold as having less than 0.3% Delta-9) actually contained 3.3–7.1% Delta-9 THC. A JAMA study found that 70% of Delta-8 products misrepresented their potency.
The labeling situation is, frankly, a mess. OpenCOA shows exactly what the lab reported. We don't adjust results or reinterpret them. But it's worth knowing that the lab result itself might not tell the full story for Delta-8 products, depending on the testing method used.
The other isomers (briefly)
Delta-8 opened the door for a wave of semi-synthetic cannabinoids. Here's the quick rundown on what you might see on a lab report or product label:
Delta-10 THC is even milder than Delta-8. Semi-synthetic, same conversion process from CBD. Covered by the 2026 federal ban.
THC-O Acetate is fully synthetic and declining for good reason. When heated, it can produce ketene gas, which is linked to lung injury. It will be reclassified as Schedule I.
THC-P (tetrahydrocannabiphorol) reportedly binds to CB1 receptors at 33 times the affinity of Delta-9. It's fully synthetic for commercial purposes and exists in a tiny market. Schedule I under the new rule.
HHC (hexahydrocannabinol) is semi-synthetic, roughly 70–80% the potency of Delta-9. Also covered by the federal ban.
THCV (tetrahydrocannabivarin) is the interesting outlier. It occurs naturally in the plant. It's not targeted by the 2026 ban. There's growing market interest around appetite suppression and wellness applications, though the research is still early.
What's growing as Delta-8 fades
The November 2026 rule kills semi-synthetic and synthetic isomers, but naturally occurring cannabinoids are having a moment:
CBN (cannabinol) is showing up everywhere in sleep products. It forms naturally as THC ages and degrades. CBG (cannabigerol), sometimes called the "mother cannabinoid" because other cannabinoids are synthesized from it in the plant, is being marketed for anti-inflammatory properties. And low-dose Delta-9 from hemp (THC beverages, microdose edibles) is the fastest-growing category in cannabis right now, operating within the current 0.3% Delta-9 threshold while it lasts.
The bottom line
Delta-8 THC is a real cannabinoid with real psychoactive effects, sold through a legal gray area that's closing fast. If you see it on a lab report, know that it won't be counted in "Total THC" because that formula only measures Delta-9. The individual cannabinoid breakdown is where the full picture lives. And if you're buying Delta-8 products, especially in states without testing requirements, understand that the label might not match what's actually in the package.
OpenCOA shows you what the lab found. Every compound, every percentage. What you do with that information is up to you.
Sources: FDA "5 Things to Know about Delta-8 THC" (fda.gov), NORML "Guide to Delta-8 and Other Novel Cannabinoids" (norml.org), Arnold & Porter "Major Changes to Federal Regulation of Hemp-Derived Products" (Dec 2025), JAMA study on Delta-8 product mislabeling, 9 NYCRR 130.23 (NYS cannabis testing regulations)