In the process of illicit drug synthesis, law enforcement agencies often focus on some common chemical precursors and reagents that may be used to make illicit drugs. For example: 1. Pseudoephedrine: Commonly used in the illegal manufacture of methamphetamine. 2. Hydroxylimine: Commonly used in the synthesis of methamphetamine. 3. Acetic anhydride: This is a key reagent in the synthesis of heroin. 4. 2-Chloroethanol and other cyano compounds: Used in the synthesis of fentanyl and its analogs. 5. Sulfuric acid, hydrochloric acid and other strong acids or bases: Used as catalysts or solvents in the processing of intermediates in multiple synthesis steps. 6. Potassium permanganate and other oxidants: Commonly used in the extraction process of coca leaf processing. Law enforcement agencies use a variety of means to identify these chemicals, including monitoring chemical sales, inspecting laboratory equipment and emissions, and conducting inspections during transportation and storage. Identifying these raw materials is critical to combating illegal drug production.