{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/thca/rhode-island/","compound":{"slug":"thca","name":"THCa","same_as":"https://en.wikipedia.org/wiki/Tetrahydrocannabinolic_acid"},"jurisdiction":{"code":"RI","name":"Rhode Island"},"as_of":"2026-09-23","answer":"As of September 23, 2026, THCa is illegal to sell at retail in Rhode Island. Illegal: total-THC basis puts THCa flower over the 0.3% hemp ceiling. Effective 2025-12-08. Controlling source: RI CCC Industrial Hemp Program rule 560-RICR-10-20-1 (adopted Dec 8, 2025) - total THC + synthetic prohibition.","forms":[{"form":"all","label":"All forms","status":"illegal","state_status":null,"federal_overlay":false,"headline":"Illegal: total-THC basis puts THCa flower over the 0.3% hemp ceiling","rule_type":"permanent","tier":"schedule_i","schedule_class":null,"limit":null,"effective_date":"2025-12-08","verified_at":"2026-09-23","confidence":"under_review","verbatim_excerpt":"the natural or synthetic equivalents of the substances contained in the plant ... or any synthetic substances, compounds, salts, or derivatives of the plant or chemicals and their isomers with similar chemical structure (THC definition reaching synthetics, 560-RICR-10-20-1)","excerpt_source_url":"https://rules.sos.ri.gov/regulations/part/560-RICR-10-20-1","citations":[{"title":"RI CCC Industrial Hemp Program rule 560-RICR-10-20-1 (adopted Dec 8, 2025) - total THC + synthetic prohibition","url":"https://rules.sos.ri.gov/regulations/part/230-80-10-1","pinpoint":null,"publisher":"Rhode Island Secretary of State","type":"gov","primary":true,"official":true}],"history":[{"date":"2026-09-23","field":"headline","from":"Restricted (effectively prohibitive): total-THC basis puts THCa flower over the 0.3% hemp ceiling","to":"Illegal: total-THC basis puts THCa flower over the 0.3% hemp ceiling"},{"date":"2026-09-23","field":"status","from":"illegal","to":"restricted"},{"date":"2026-09-23","field":"status","from":"restricted","to":"illegal"},{"date":"2026-09-23","field":"status","from":"restricted","to":"illegal"},{"date":"2026-09-23","field":"headline","from":"total-THC basis kills THCa flower","to":"Restricted (effectively prohibitive): total-THC basis puts THCa flower over the 0.3% hemp ceiling"},{"date":"2026-09-23","field":"status","from":"illegal","to":"restricted"},{"date":"2026-09-23","field":"effectively_prohibitive","from":"false","to":"true"}]}],"neighbors":[{"code":"CT","status":"illegal"},{"code":"MA","status":"illegal"}],"laws":[{"citation":"560-RICR-10-20-1 (RI Cannabis Control Commission - Industrial Hemp Program), Sec. 1.5 (Definitions), Sec. 1.6, and Sec. 1 Product Prohibitions","title":"560-RICR-10-20-1 - Rhode Island Industrial Hemp Program (Cannabis Control Commission): 'THC' and 'Industrial hemp' definitions, synthetic-cannabinoid prohibition, product prohibitions, and total-THC mg caps","official_url":"https://rules.sos.ri.gov/regulations/part/560-10-20-1","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"29becc53eff103a532530c661fe4334766e9b7734065bf92cbb792755fff471a"},{"citation":"560-RICR-10-20-1 Section 1.5(A)(2)","title":"Rhode Island Industrial Hemp Program - Definitions - \"Acceptable Hemp THC level\"","official_url":"https://rules.sos.ri.gov/regulations/part/560-10-20-1","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-18","text_hash":"362152222fa348ad1c02149507c331f3052ee7a725472ae094c422022c082a54"},{"citation":"560-RICR-10-20-1 Section 1.6(I) (conversion/synthetic-cannabinoid prohibition); Section 1.5(A)(2) (Acceptable Hemp THC Level)","title":"Rhode Island Industrial Hemp Program -- Prohibition on conversion of cannabinoids and sale of synthetic cannabinoids; Acceptable Hemp THC Level","official_url":"https://rules.sos.ri.gov/regulations/part/560-10-20-1","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-19","text_hash":"f16d0e52c367607efb6667b03500d0d161b979cb968139971d0aadc911a9ae6b"},{"citation":"560-RICR-10-20-1, 1.5(A)(2), 1.11(G)(1)(a), 1.11(K); R.I. Gen. Laws 2-26-3","title":"560-RICR-10-20-1, 1.5(A)(2), 1.11(G)(1)(a), 1.11(K); R.I. Gen. Laws 2-26-3","official_url":"https://rules.sos.ri.gov/Regulations/part/560-10-20-1","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"8fee22cc17331a5888133f4e6265fb91e9c1a72030c2d6dcb685a1ad7306ec7d"},{"citation":"R.I. Gen. Laws Sec. 2-26-3 (Hemp Growth Act - Definitions)","title":"R.I. Gen. Laws Sec. 2-26-3 - Definitions (Hemp Growth Act)","official_url":"https://law.justia.com/codes/rhode-island/title-2/chapter-2-26/section-2-26-3/","source_label":"MIRROR","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"d8dad2826b287271f24cb10c69683e2c75ae8d4005ea60baa001d4a567c475c5"},{"citation":"R.I.G.L. 44-20-61","title":"Product restrictions on electronic nicotine-delivery system products","official_url":"https://webserver.rilegislature.gov/Statutes/TITLE44/44-20/44-20-61.htm","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"81fc50395983bf89c8125ac5a2ec0524ddb49d4334f9dd208e9f39d57ecdf9bd"}]}