Department of Justice May 25, 2006 – Federal Register Recent Federal Regulation Documents

The Controlled Substances Act (CSA) and its implementing regulations specify which hallucinogenic substances are considered Schedule I controlled substances. The CSA states that all salts, isomers and salts of isomers of these substances are also Schedule I controlled substances. In non-technical terms, an isomer of a substance is a different compound, but a compound which has the same number and kind of atoms. The terms ``optical isomer'' and ``geometric isomer'' are specific scientific terms and it is easy to determine whether one substance is an optical or geometric isomer of another. The term ``positional isomer,'' however, is subject to scientific interpretation. This Notice of Proposed Rulemaking proposes the addition of a specific definition for the term ``positional isomer'' to allow for the systematic determination of which isomers of Schedule I substances would be considered to be ``positional'' and, therefore subject to Schedule I control. The addition of a definition for the term ``positional isomer'' will assist legitimate research and industry in determining the control status of materials that are ``positional isomers'' of Schedule I hallucinogens. While the DEA will remain the authority for ultimately determining the control status of a given material, providing a specific definition for ``positional isomer'' will ensure consistent criteria are utilized in making these determinations. This rule is relevant only to specialized forensic or research chemists. Most of these individuals are existing DEA registrants who are authorized by the DEA to handle Schedule I hallucinogenic substances.