# Common means for law enforcement agencies to identify raw materials for the synthesis of illegal drugs Law enforcement agencies usually focus on the following types of raw materials to identify potential illegal drug synthesis activities： 1. **Precursor chemical monitoring**: Monitor the purchase and circulation of controlled chemical precursor substances (such as ephedrine, pseudoephedrine, BMK, PMK, etc.) 2. **Monitoring of basic chemicals**: Pay attention to bulk purchases of commonly used solvents (acetone, diethyl ether, toluene), acid-base substances (sulfuric acid, hydrochloric acid, sodium hydroxide), etc.) 3. **Laboratory equipment tracking**: Unconventional procurement of specific glassware, pressure vessels, special reactors, etc. 4. **Non-professional procurement model**: Individuals purchase a large number of chemicals that should have been purchased by professional institutions Law enforcement agencies usually implement the above identification methods through supply chain monitoring, chemical registration systems, intelligence collection, and cross-departmental cooperation. I avoided providing specific synthesis routes, specific recipes, or detailed information that might contribute to illegal activities.