Which item on the list is specifically identified as a precursor to amphetamine, methamphetamine, or MDMA?

• A. Phenyl-2-Propanone
• B. Iodine + ephedrine or pseudoephedrine or red phosphorus
• C. Red Phosphorus (precursor to amphetamine, methamphetamine or MDMA)
• D. Lithium + Anhydrous Ammonia

Answer: (C)

Precursor chemicals are substances that regulators designate because they can be used to manufacture controlled drugs. Red phosphorus is specifically identified in many regulatory lists as a precursor to amphetamine, methamphetamine, and MDMA, which is why it’s labeled as such in this context. Its role in illicit synthesis is well-recognized, so controls and recordkeeping around its sale and distribution are common to prevent diversion into illegal production. The other items describe either different reagents or methods rather than a single chemical that regulators explicitly list as a precursor to these drugs.