As of September 23, 2026, Endomorphin-1 is legal to sell at retail in Kansas. Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide. Controlling source: K.S.A. 65-4101(g) (controlled substance analog).
Verified September 23, 2026 (manual) · confidence: confirmedEndomorphin-1 (Tyr-Pro-Trp-Phe-NH2) is not named or scheduled in Kansas. The state has a controlled-substance analogue/designer-drug statute whose effect prong can satisfy the test without structural similarity. It still does not operatively reach EM-1 as sold (see effect-prong scope / 'specifically designed' / human-consumption gate in the detail). Controlling instrument reviewed: K.S.A. 65-4101(g) (controlled substance analog). Conclusion: no operative instrument reaches a structurally-dissimilar endogenous opioid peptide; status LEGAL at the state controlled-substances level. Residual risk: low. Federal floor still applies (Analogue Act human-consumption contingency + FD&C unapproved-new-drug).
K.S.A. 65-4101(g): "'Controlled substance analog' means a substance that is intended for human consumption, AND at least one of the following: (A) The chemical structure ... is substantially similar ...; (B) the substance has a stimulant, depressant or hallucinogenic effect on the central nervous system substantially similar ...; or (C) ... such individual represents or intends ..." [Disjunctive effect, BUT gated by 'intended for human consumption'; effect prong = stimulant/depressant/hallucinogenic only.]
Among Kansas's 4 neighbors, Colorado, Missouri, Nebraska and Oklahoma are legal, the same posture as Kansas.
Open the interactive map · Every compound in Kansas
Not federally scheduled. Endomorphin-1 - not federally scheduled; endogenous opioid tetrapeptide, no CSA entry and no analogue-act structural hook Federal detail
2 instruments on file for this compound's framework in Kansas; 2 of 2 citations above are official sources. Each text carries its source and a fingerprint that changes when the law does.
a02f31d36747718b21-5705. Unlawful cultivation or distribution of controlled substances. (a) It shall be unlawful for any person to distribute or possess with the intent to distribute any of the following controlled substances or controlled substance analogs thereof: (1) Opiates, opium or narcotic drugs, or any stimulant designated in K.S.A. 65-4107(d)(1), (d)(3) or (f)(1), and amendments thereto; (2) any depressant designated in K.S.A. 65-4105(e), 65-4107(e), 65-4109(b) or (c) or 65-4111(b), and amendments thereto; (3) any stimulant designated in K.S.A. 65-4105(f), 65-4107(d)(2), (d)(4), (d)(5) or (f)(2) or 65-4109(e), and amendments thereto; (4) any hallucinogenic drug designated in K.S.A. 65-4105(d), 65-4107(g) or 65-4109(g), and amendments thereto; (5) any substance designated in K.S.A. 65-4105(g) or 65-4111(c), (d), (e), (f) or (g), and amendments thereto; (6) any anabolic steroids as defined in K.S.A. 65-4109(f), and amendments thereto; or (7) any substance designated in K.S.A. 65-4105(h), and amendments thereto.
3b14586483ae7596**Analog statute — K.S.A. 65-4101(g)(1):** "'Controlled substance analog' means a substance that is intended for human consumption, and at least one of the following: (A) The chemical structure of the substance is substantially similar to the chemical structure of a controlled substance listed in or added to the schedules designated in K.S.A. 65-4105 or 65-4107 …; (B) the substance has a stimulant, depressant or hallucinogenic effect on the central nervous system substantially similar to … a controlled substance included in the schedules designated in K.S.A. 65-4105 or 65-4107 …; or (C) with respect to a particular individual, such individual represents or intends the substance to have a … hallucinogenic effect … substantially similar …" — K.S.A. 65-4101(g), official Kansas Revisor of Statutes: https://ksrevisor.gov/statutes/chapters/ch65/065_041_0001.html **"Isomer" definition (why the schedule catch-all does not reach it) — K.S.A. 65-4101(y):** "'Isomer' means all enantiomers and diastereomers." (4-HO-MET is a homolog of the listed 4-substituted tryptamines, not an enantiomer/diastereomer — so the 65-4105(d) "salts, isomers and salts of isomers" sweep does not capture it.) — K.S.A. 65-4101(y), same official URL. **Schedule gap — K.S.A. 65-4105(d):** the hallucinogen list names AET, bufotenine, DET, DMT, psilocybin, psilocyn, AMT, 5-MeO-DiPT, 5-MeO-DMT, etc.; **4-HO-MET is not named**, and there is no "4-hydroxytryptamine"/"any tryptamine" generic in the subsection. — K.S.A. 65-4105(d), official Revisor: https://ksrevisor.gov/statutes/chapters/ch65/065_041_0005.html
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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