{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/endomorphin-1/washington/","compound":{"slug":"endomorphin_1","name":"Endomorphin-1","same_as":"https://en.wikipedia.org/wiki/Endomorphin"},"jurisdiction":{"code":"WA","name":"Washington"},"as_of":"2026-07-18","answer":"As of July 18, 2026, Endomorphin-1 is legal to sell at retail in Washington. Unscheduled - legal as research-use-only; no operative instrument reaches a structurally-dissimilar opioid peptide. Controlling source: RCW 69.50.101(16) (controlled substance analog; offense 69.50.214; human-consumption gate).","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":"RCW 69.50.101(16): \"'Controlled substance analog' means a substance the chemical structure of which is substantially similar to the chemical structure of a controlled substance in Schedule I or II AND: (i) that has a stimulant, depressant, or hallucinogenic effect on the central nervous system substantially similar to [that] of a controlled substance included in Schedule I or II; or (ii) ... that the individual represents or intends to have [such] effect ...\" (69.50.214: analog treated as Schedule I to the extent intended for human consumption). [Conjunctive - structure prong fails; human-consumption gate.]","excerpt_source_url":"https://app.leg.wa.gov/rcw/default.aspx?cite=69.50.204","citations":[{"title":"RCW 69.50.101(16) (controlled substance analog; offense 69.50.214; human-consumption gate)","url":"https://app.leg.wa.gov/rcw/default.aspx?cite=69.50.101","pinpoint":null,"publisher":"Washington Legislature","type":"statute","primary":true,"official":true},{"title":"RCW 69.50.101(33) (narcotic drug def)","url":"https://app.leg.wa.gov/RCW/default.aspx?cite=69.50.204","pinpoint":null,"publisher":"Washington Legislature","type":"statute","primary":false,"official":true}],"history":[]}],"neighbors":[{"code":"ID","status":"legal"},{"code":"OR","status":"legal"}],"laws":[{"citation":"RCW 69.50.204(c) (Schedule I hallucinogens — enumerated, 4-HO-MET absent); RCW 69.50.101(16) (controlled substance analog)","title":null,"official_url":"https://app.leg.wa.gov/RCW/default.aspx?cite=69.50.204&pdf=true","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-06-19","text_hash":"f2016f99bbc64a470381e3baf3788ab79b2f96fe9d4ff7c5fd8a228cb126b774"},{"citation":"RCW 69.50.214 (with RCW 69.50.101(16)(a))","title":"Controlled substance analog treated as Schedule I (deeming clause) and the controlled-substance-analog definition","official_url":"https://app.leg.wa.gov/rcw/default.aspx?cite=69.50.214","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-20","text_hash":"b89d8e66c22f4597cfab452f33f0c65f718a1e54c59061122967cb5cadfef03a"}]}