Colorado’s residual solvent panel grew from 13 to 31 analytes. Enforcement began September 28, 2026; triethylamine follows. For the 18 new solvents, any result above the lab’s limit of detection fails the batch. Many are flavor ingredients, like butyl acetate and isoamyl alcohol, so a terpene blend can fail your concentrate. California COAs don’t cover them.

Key takeaways

• 31 analytes, enforced September 28, 2026. 18 are new. Triethylamine enforcement follows later, with at least 72 hours’ notice from the Marijuana Enforcement Division (MED).

• The 18 new solvents are “None Detected.” There is no allowable level. A trace fails the batch.

• Many of the new analytes are common flavor ingredients. Butyl acetate, isoamyl alcohol (3-methyl-1-butanol), isobutyl acetate, ethyl formate, methyl acetate, and propyl acetate are building blocks of fruit, candy, and banana profiles.

• Dilution doesn’t save you on the new 18. A blend dosed at 10% still carries a detectable trace into the finished concentrate.

• California COAs are not Colorado COAs. Panels and limits differ. Old-panel or out-of-state results don’t prove compliance.

Eybna’s terpene systems are screened against the full 31-analyte Colorado panel at both the COA and ingredient level, with SC Labs COAs and full ingredient disclosures.

What changed in Colorado?

The MED adopted the expanded panel under 1 CCR 212-3, Rule 4-215, Table 4-215(J)(6)(a), effective July 1, 2026. Enforcement was delayed because no lab was certified to run the full panel yet. Once certified testing was available, the MED set enforcement for September 28, 2026 (Industry Bulletin 26:09).

The requirements apply to solvent-based regulated marijuana concentrates, products that contain them, and certain hemp products entering the regulated market.

The full Colorado residual solvent panel

Existing analytes and the numeric limits

New analytes with a 0 detection limit

Why terpene blends are now the risk

The old panel was built around extraction solvents: butane, propane, hexane. Clean extraction meant a clean test.

The new panel reaches into flavor chemistry. Many of the newly listed compounds are esters and alcohols that flavor houses use to build fruit and candy notes:

• Banana and tropical profiles often rely on isoamyl and butyl acetate. Isoamyl acetate can also break down into isoamyl alcohol (3-methyl-1-butanol), which is on the list.

• Apple, pear, and berry profiles commonly use butyl, propyl, and isobutyl acetates.

• Rum, fruity, and “candy” top notes can use ethyl formate and methyl acetate.

• Carriers and diluents can bring in ethanol or isopropanol.

None of these are extraction failures. They’re formulation choices, and under the new panel they fail batches.

Colorado compliance checklist

Formulation

• No new-panel analytes anywhere in the formula, including sub-bases and flavor modifiers

• Ester-driven fruit profiles reformulated or replaced

• Carrier and diluent solvents identified and quantified

• Existing-panel solvents comfortably below limits at your dosing rate

Documentation

• COA covering all 31 analytes, not the old 13

• COA from a lab certified for the expanded Colorado panel

• Full ingredient disclosure, down to sub-base level

• COA matches the current formulation version

Internal QA

• Re-screen every SKU that passed before September 28

• Flag any product with banana, apple, pear, or tropical ester notes

• Confirm your supplier’s COAs aren’t California-panel results

• Re-check when Colorado’s annual rule updates take effect

Why Colorado products are failing now

• Fruit-ester flavor ingredients carried through from the terpene blend

• Supplier COAs that only cover the old 13 analytes

• California-panel COAs treated as proof of Colorado compliance

• Sub-bases inside blends that were never screened

• Assuming low dosing dilutes traces below a “None Detected” limit

The hidden bottleneck: your terpene supplier

Your extraction can be perfect and your batch can still fail because of one ingredient in your flavor.

Red flags before you formulate:

• COAs that don’t list the new analytes

• COAs run to another state’s panel

• No ingredient-level disclosure for sub-bases

• No answer when you ask whether the blend contains butyl acetate or isoamyl alcohol

Colorado-ready terpenes

Eybna screened its full catalog against the 31-analyte Colorado panel. Each blend was checked two ways: its SC Labs COA results, and its full ingredient list, expanded through every sub-base, for any new-panel analyte.

Lines with strong Colorado results include the Pure Terpenes Line, Live Line, Live+, Palate Line, Enhancer Bases, Hash Line, Lava Line, and Sour Candy Line. For ester-driven profiles like banana, we’ll point you to a Colorado-safe direction rather than ship a blend that’s built to fail.

Ready to build your Colorado-ready product lineup? Our Formulation Specialists are here to help!