In the context of methamphetamine production, acetone is sometimes used to wash or recrystallize the substance. This process can help remove impurities and improve the appearance and purity of the final product.
Lab analyses of seized meth from the DEA show that unwashed street meth averages 50-70% purity. A properly executed double anhydrous acetone wash can elevate purity to 90-98%. washing meth with acetone free