{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/thca/colorado/","compound":{"slug":"thca","name":"THCa","same_as":"https://en.wikipedia.org/wiki/Tetrahydrocannabinolic_acid"},"jurisdiction":{"code":"CO","name":"Colorado"},"as_of":"2026-10-07","answer":"As of October 7, 2026, THCa is legal to sell at retail with restrictions in Colorado. THCa flower restricted - cap/condition applies. The limit is 1.75 mg THC (mg per serving).","forms":[{"form":"all","label":"All forms","status":"restricted","state_status":null,"federal_overlay":false,"headline":"THCa flower restricted - cap/condition applies","rule_type":"permanent","tier":"concentration_cap","schedule_class":null,"limit":{"type":"mg_per_serving","value":1.75,"unit":"mg THC"},"effective_date":"2023-05-01","verified_at":"2026-10-07","confidence":"confirmed","verbatim_excerpt":"non-intoxicating cannabinoid ... no more than 1.75 mg THC per serving and a CBD:THC ratio greater than 15:1 (SB23-271 / C.R.S. 25-5-427)","excerpt_source_url":"https://content.leg.colorado.gov/sites/default/files/2023a_271_signed.pdf","citations":[],"history":[{"date":"2026-09-23","field":"status","from":"illegal","to":"restricted"},{"date":"2026-09-23","field":"status","from":"restricted","to":"illegal"}]}],"neighbors":[{"code":"AZ","status":"illegal"},{"code":"KS","status":"legal"},{"code":"NE","status":"restricted"},{"code":"NM","status":"illegal"},{"code":"OK","status":"restricted"},{"code":"UT","status":"illegal"},{"code":"WY","status":"illegal"}],"laws":[{"citation":"6 CCR 1010-24, Sections 24.4 (Definitions), 24.9 (Offenses)","title":"Colorado Hemp Product and Safe Harbor Hemp Product Regulations -- Definitions and Offenses","official_url":"https://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=11299&fileName=6+CCR+1010-24","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-18","text_hash":"6df0325b7c01d14579dbb482753fff4d5dbeaf4395272b9f0349b29b212e8985"},{"citation":"6 CCR 1010-24.4 (Definitions); 6 CCR 1010-24.9 (Offenses)","title":"Colorado Hemp Product and Safe Harbor Hemp Product Regulations -- synthetic cannabinoid definition and prohibition","official_url":"https://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=11299&fileName=6+CCR+1010-24","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-19","text_hash":"ef10afe582c23de7e5f6058a6ec41111d9ccfd1c5b8ca4aa0665f6a3ba32f4e2"},{"citation":"C.R.S. 25-5-427 (SB 23-271, Ch. 444)","title":"C.R.S. 25-5-427 (SB 23-271, Ch. 444)","official_url":"https://content.leg.colorado.gov/sites/default/files/documents/2023A/bills/sl/2023a_sl_444.pdf","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"f2c1c6cfd333ebd6219cc1332d5e95f652b07d28af014c101a7d040a470af0b1"},{"citation":"C.R.S. 25-5-427(2)(d), (4)(b)(I), (8)","title":"C.R.S. 25-5-427(2)(d), (4)(b)(I), (8)","official_url":"https://colorado.public.law/statutes/crs_25-5-427","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"ca745b981a16d2406ca116956b7b5f33b182c76b2e3845e31f72f09f0ec6cffa"},{"citation":"C.R.S. Sec. 25-5-427","title":"Classes of hemp-derived compounds and cannabinoids - definitions - registration required - prohibitions - safe harbor - rules - repeal","official_url":"https://content.leg.colorado.gov/sites/default/files/images/olls/crs2023-title-25.pdf","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"f134529330dc40596111781ccb90b4a0e15d766178af7bcc907b6229b87b900a"},{"citation":"C.R.S. Sec. 35-61-101(7)","title":"Definitions - 'Industrial hemp' or 'hemp'","official_url":"https://content.leg.colorado.gov/sites/default/files/images/olls/crs2023-title-35.pdf","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"c68c9ac60aecc230fac537dc1b8b3cc45b3a378906e671343a9031aa8795ca59"},{"citation":"C.R.S. Sec. 44-10-209(2)","title":"Classes of marijuana-derived cannabinoids and compounds - definitions - privileges - prohibitions - rule-making - rules","official_url":"https://content.leg.colorado.gov/sites/default/files/images/olls/crs2023-title-44.pdf","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"db5a15168328a3d1cae7c957a766dbded3f9cabc1f094d4f7abd71ec6f24c739"},{"citation":"CO Dept of Agriculture / Marijuana Enforcement Division (MED) guidance, citing C.R.S. Sec. 25-5-426(1)(g.3) & (g.5) and 25-5-426(4)(d)","title":"Production or Use of Chemically Modified or Converted Industrial Hemp Cannabinoids","official_url":"https://ag.colorado.gov/production-or-use-of-chemically-modified-or-converted-industrial-hemp-cannabinoids","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"17d585d02ab6916ef3f022a2840eb32709905a5ea6297e6f05ffa4f9e3b29d08"}]}