In Wisconsin, Compound Laws tracks 19 compounds: 4 legal to sell at retail, 2 restricted, 3 in a gray area, 4 illegal, 1 not yet verified, and 5 whose status varies by product form. Verified through October 22, 2026.
3a1ed7bf79fb18f5**§ 961.14(4) (hallucinogen chapeau)** — "(4) Hallucinogenic substances. Any material, compound, mixture or preparation which contains any quantity of any of the following hallucinogenic substances, including any of their salts, isomers, esters, ethers, and salts of isomers, esters, or ethers that are theoretically possible within the specific chemical designation, in any form contained in a plant, obtained from a plant, or chemically synthesized:" — Wis. Stat. § 961.14(4), https://docs.legis.wisconsin.gov/document/statutes/961.14(4) (OFFICIAL — Wisconsin Legislature). Psilocin (s) and Psilocybin (r) are listed; 4-HO-MET is not, and there is no substituted-tryptamine class. **§ 961.01(12g) (isomer definition — narrows the catch-all)** — "'Isomer' means an optical isomer, but … in ss. 961.14(2)(nd) and (4) and 961.18(2m) 'isomer' includes any positional or geometric isomer." — Wis. Stat. § 961.01(12g), https://codes.findlaw.com/wi/controlled-substances-ch-961/wi-st-961-01/ (MIRROR: FindLaw). A homolog is neither positional nor geometric, so 4-HO-MET falls outside the class. **§ 961.01(4m)(a) (controlled substance analog)** — "'Controlled substance analog' means a substance the chemical structure of which is substantially similar to the chemical structure of a controlled substance included in schedule I or II and: 1. Which has a stimulant, depressant, narcotic or hallucinogenic effect on the central nervous system substantially similar to … a controlled substance included in schedule I or II; or 2. With respect to a particular individual, which the individual represents or intends to have [such effect] …" — Wis. Stat. § 961.01(4m)(a), https://codes.findlaw.com/wi/controlled-substances-ch-961/wi-st-961-01/ (MIRROR: FindLaw).
066ae72f238df681[Wisconsin Legislative Council issue brief, May 19, 2026:] [s. 94.55(1) defines hemp as the Cannabis plant with THC up to 0.3 percent on a dry weight basis; the state definition] "continues to focus solely on delta-9 THC concentration rather than on total THC" [and] "the state's 'hemp' definition does not automatically change with a change to the federal definition." [Statute text not separately fetched.]
40bc8ab02d552a10Wis. Stat. 961.14(7) (Schedule I - STIMULANTS), chapeau: "(7) STIMULANTS. Any material, compound, mixture or preparation which contains any quantity of any of the following substances having a stimulant effect on the central nervous system, including any of their salts, isomers and salts of isomers that are theoretically possible within the specific chemical designation:" Entries: "(mk) Mitragynine." "(mL) 7-hydroxymitragynine." Wis. Stat. 961.01(12g) (definition of "Isomer"): "(12g) \"Isomer\" means an optical isomer, but in s. 961.16 (2) (b) 1. \"isomer\" includes any geometric isomer; in s. 961.20 (4) (am) \"isomer\" includes any positional isomer; and in ss. 961.14 (2) (nd) and (4) and 961.18 (2m) \"isomer\" includes any positional or geometric isomer."
116ab44ea3a2157794.55 Industrial hemp. (1) Definition. In this section, "hemp" means the plant Cannabis sativa L. and any part of that plant, including the seeds thereof and all derivatives, extracts, cannabinoids, isomers, acids, salts, and salts of isomers, whether growing or not, 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. "Hemp" does not include a prescription drug product that has been approved by the U.S. food and drug administration. (2) Regulation of hemp. (a) Subject to the provisions under this section, a person may plant, grow, cultivate, harvest, produce, sample, test, process, transport, transfer, take possession of, sell, import, and export hemp in this state to the greatest extent allowed under federal law. (am) The department shall issue licenses to hemp producers if hemp producers are required to hold a license to produce hemp under federal law and if the secretary of the U.S. department of agriculture has approved this state's hemp program. If the department issues such licenses, no person may produce hemp without a license from the department.
0a7fd287ab38c917961.25 Controlled substance analog treated as a schedule I substance. A controlled substance analog, to the extent it is intended for human consumption, shall be treated, for the purposes of this chapter, as a substance included in schedule I, unless a different treatment is specifically provided. No later than 60 days after the commencement of a prosecution concerning a controlled substance analog, the district attorney shall provide the controlled substances board with information relevant to emergency scheduling under s. 961.11 (4m). After a final determination by the controlled substances board that the controlled substance analog should not be scheduled, no prosecution relating to that substance as a controlled substance analog may be commenced or continued. 961.01 (4m) (a) "Controlled substance analog" means a substance the chemical structure of which is substantially similar to the chemical structure of a controlled substance included in schedule I or II and: 1. Which has a stimulant, depressant, narcotic or hallucinogenic effect on the central nervous system substantially similar to the stimulant, depressant, narcotic or hallucinogenic effect on the central nervous system of a controlled substance included in schedule I or II; or 2. With respect to a particular individual, which the individual represents or intends to have a stimulant, depressant, narcotic or hallucinogenic effect on the central nervous system substantially similar to the stimulant, depressant, narcotic or hallucinogenic effect on the central nervous system of a controlled substance included in schedule I or II.
Compound Laws, published by Compound Analytics, reports the record: statutes verbatim, official citations, enforcement facts and verification dates. Nothing here is legal advice and nothing here describes how to get around a law. A jurisdiction with no verified row is reported as not yet verified, never as legal. Found an error? Corrections policy.
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