{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/endomorphin-1/arkansas/","compound":{"slug":"endomorphin_1","name":"Endomorphin-1","same_as":"https://en.wikipedia.org/wiki/Endomorphin"},"jurisdiction":{"code":"AR","name":"Arkansas"},"as_of":"2026-07-18","answer":"As of July 18, 2026, Endomorphin-1 is legal to sell at retail in Arkansas. Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide. Controlling source: None - counterfeit substance only (Ark. Code 5-64-101(5)).","forms":[{"form":"all","label":"All forms","status":"legal","state_status":null,"federal_overlay":false,"headline":"Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide","rule_type":"permanent","tier":"unscheduled","schedule_class":null,"limit":null,"effective_date":null,"verified_at":"2026-07-18","confidence":"confirmed","verbatim_excerpt":"Ark. Code 5-64-101(5): \"'Counterfeit substance' means a noncontrolled substance, that by overall dosage unit appearance including color, shape, size, markings ... or upon the basis of representations made to the recipient, purports to be a controlled substance or to have the physical or psychological effect associated with a controlled substance.\" No structure/effect analogue statute. [Appearance/representation only.]","excerpt_source_url":"https://codes.findlaw.com/ar/title-5-criminal-offenses/ar-code-sect-5-64-101/","citations":[{"title":"None - counterfeit substance only (Ark. Code 5-64-101(5))","url":"https://codes.findlaw.com/ar/title-5-criminal-offenses/ar-code-sect-5-64-101/","pinpoint":null,"publisher":"Code mirror","type":"statute","primary":true,"official":true},{"title":"Ark. Code 5-64-101(17) (narcotic/opiate def)","url":"https://codes.findlaw.com/ar/title-5-criminal-offenses/ar-code-sect-5-64-101/","pinpoint":null,"publisher":"Code mirror","type":"statute","primary":false,"official":true}],"history":[]}],"neighbors":[{"code":"LA","status":"legal"},{"code":"MO","status":"legal"},{"code":"MS","status":"legal"},{"code":"OK","status":"legal"},{"code":"TN","status":"legal"},{"code":"TX","status":"legal"}],"laws":[{"citation":"Ark. Code Sec. 5-64-414","title":"Controlled substance analog","official_url":"https://advance.lexis.com/container?config=Arkansas+Code","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-07-20","text_hash":"8b08e9b5aa606d970ebf0b9c361549f7123b42dba6fe6a96b10ec5d98339f646"},{"citation":"Arkansas List of Controlled Substances (Dept. of Health rule), Article II Schedule I, (d) hallucinogenic substances","title":"Arkansas List of Controlled Substances (Dept. of Health rule), Article II Schedule I, (d) hallucinogenic substances","official_url":"https://codeofarrules.arkansas.gov/Rules/PartDocument?partID=705","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-08","text_hash":"0e4bb5ed5f750abfad4888848213c30f86d1a3db4457a43c42cdbe794b3858ba"},{"citation":"Arkansas State Board of Health Controlled Substances List, Schedule I(d) hallucinogens (under Ark. Code §§ 5-64-201/-205 — does NOT name it); analog reach via Ark. Code § 5-64-414.","title":null,"official_url":"https://arkleg.state.ar.us/Home/FTPDocument?path=/Assembly/Meeting+Attachments/430/26353/Exhibit+I+-+Controlled+Substance+List.pdf","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-06-19","text_hash":"383736ff797cfc9e43298a641080dc6b56f7580db49a85f72bc7654824dc50b5"}]}