{"brand":"Compound Laws","url":"https://compoundlaws.com/compounds/thca/wisconsin/","compound":{"slug":"thca","name":"THCa","same_as":"https://en.wikipedia.org/wiki/Tetrahydrocannabinolic_acid"},"jurisdiction":{"code":"WI","name":"Wisconsin"},"as_of":"2026-10-22","answer":"As of October 22, 2026, THCa is illegal to sell at retail in Wisconsin. Illegal: post-decarboxylation (total-THC) testing basis bars raw THCa flower. Controlling source: Wis. Stat. Sec. 94.55 - delta-9 definition (post-decarb testing); producer license/fee.","forms":[{"form":"all","label":"All forms","status":"illegal","state_status":null,"federal_overlay":false,"headline":"Illegal: post-decarboxylation (total-THC) testing basis bars raw THCa flower","rule_type":"permanent","tier":"concentration_cap","schedule_class":null,"limit":null,"effective_date":null,"verified_at":"2026-10-22","confidence":"under_review","verbatim_excerpt":"'hemp' means the plant Cannabis sativa L. ... with a delta-9-tetrahydrocannabinol concentration of not more than 0.3 percent on a dry weight basis or the maximum concentration allowed under federal law up to 1 percent, whichever is greater, as tested using post-decarboxylation or other similarly reliable methods. (Wis. Stat. 94.55(1))","excerpt_source_url":"https://docs.legis.wisconsin.gov/statutes/statutes/94/55","citations":[{"title":"Wis. Stat. Sec. 94.55 - delta-9 definition (post-decarb testing); producer license/fee","url":"https://docs.legis.wisconsin.gov/statutes/statutes/94/55","pinpoint":null,"publisher":"Wisconsin State Legislature","type":"gov","primary":true,"official":true}],"history":[{"date":"2026-09-23","field":"status","from":"restricted","to":"illegal"},{"date":"2026-09-23","field":"headline","from":"Delta-9 wording, post-decarb testing","to":"Illegal: post-decarboxylation (total-THC) testing basis bars raw THCa flower"},{"date":"2026-09-23","field":"status","from":"illegal","to":"restricted"},{"date":"2026-09-23","field":"status","from":"restricted","to":"illegal"}]}],"neighbors":[{"code":"IL","status":"restricted"},{"code":"IA","status":"illegal"},{"code":"MI","status":"illegal"},{"code":"MN","status":"illegal"}],"laws":[{"citation":"Wis. Stat. 94.55(1)","title":"Wis. Stat. 94.55(1)","official_url":"https://docs.legis.wisconsin.gov/misc/lc/issue_briefs/2026/alcohol_beverages_and_cannabis/ib_federal_hemp_legislation_ao_2026_05_19","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-10-07","text_hash":"066ae72f238df681b67bc6b2ed881253a08df9f05f70d21b7b757f046d518385"},{"citation":"Wis. Stat. Sec. 94.55(1), (2)","title":"Industrial hemp -- Definition; Regulation of hemp","official_url":"https://docs.legis.wisconsin.gov/statutes/statutes/94/55","source_label":"OFFICIAL","effective_date":null,"retrieved_date":"2026-07-02","text_hash":"116ab44ea3a21577e85a2d1796d7ad36942c9d8e869edd2a9bc9b67c654c635b"}]}