{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/endomorphin-1/illinois/","compound":{"slug":"endomorphin_1","name":"Endomorphin-1","same_as":"https://en.wikipedia.org/wiki/Endomorphin"},"jurisdiction":{"code":"IL","name":"Illinois"},"as_of":"2026-07-18","answer":"As of July 18, 2026, Endomorphin-1 is legal to sell at retail in Illinois. Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide. Controlling source: 720 ILCS 570/102 (controlled substance analog).","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":"720 ILCS 570/102: \"'Controlled substance analog' ... means a substance ... that has a chemical structure substantially similar to that of a controlled substance in Schedule I or II, OR that was specifically designed to produce an effect substantially similar to that of a controlled substance in Schedule I or II.\" [Disjunctive; the 'specifically designed' prong targets designer drugs - an endogenous peptide is not 'designed'.]","excerpt_source_url":"https://www.ilga.gov/Documents/legislation/ilcs/documents/072005700K401.htm","citations":[{"title":"720 ILCS 570/102 (controlled substance analog)","url":"https://www.ilga.gov/Documents/legislation/ilcs/documents/072005700K401.htm","pinpoint":null,"publisher":"Illinois Legislature","type":"statute","primary":true,"official":true},{"title":"720 ILCS 570/102 (opiate def)","url":"https://codes.findlaw.com/il/chapter-720-criminal-offenses/il-st-sect-720-570-102/","pinpoint":null,"publisher":"Illinois Legislature","type":"statute","primary":false,"official":true}],"history":[]}],"neighbors":[{"code":"IN","status":"legal"},{"code":"IA","status":"legal"},{"code":"KY","status":"legal"},{"code":"MO","status":"legal"},{"code":"WI","status":"legal"}],"laws":[{"citation":"720 ILCS 570/204 (Schedule I), subsection (d) hallucinogens","title":"720 ILCS 570/204 (Schedule I), subsection (d) hallucinogens","official_url":"https://www.ilga.gov/legislation/ilcs/fulltext.asp?DocName=072005700K204","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-08","text_hash":"e391e180685834443cde3fdc63cada8c8f53ad97c32c5d11ffa85c75b201255a"},{"citation":"720 ILCS 570/204(d) — Illinois Controlled Substances Act, Schedule I hallucinogens; 4-HO-MET at (d)(79).","title":null,"official_url":"https://law.justia.com/codes/illinois/2021/chapter-720/act-720-ilcs-570/article-ii/","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-06-19","text_hash":"9e72e7d7ab83df36e2476a816faf0b1f4e3dcc192aa2a3d2b587c907a5324017"},{"citation":"720 ILCS 570/204(f)","title":"Schedule I; enumeration -- Stimulants (Illinois Controlled Substances Act)","official_url":"https://www.ilga.gov/Documents/legislation/ilcs/documents/072005700K204.htm","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-20","text_hash":"3bf228249e291429f6d5050180850b73907f802eaa193b2109c00dc0770c2895"}]}