Thus, when you pour cold acetone over crushed methamphetamine HCl, the meth crystals do not dissolve. However, the water-soluble impurities do dissolve into the acetone. You then filter the mixture, leaving purified meth crystals on the filter paper and discarding the acetone-impurity solution.
in a chemical context refers to the process of removing impurities from a solid substance by rinsing it with a solvent in which the desired product is insoluble, but the contaminants are soluble. While this technique is a standard laboratory procedure for purifying various compounds, its application to controlled substances like methamphetamine carries significant legal, safety, and health risks. The Chemical Principle of "Washing" washing meth with acetone free
