The most common method for removing these water-soluble contaminants is a process known as Among drug users and illicit chemists, the phrase "washing meth with acetone" is ubiquitous. But what does "acetone free" mean in this context? Why does the acetone need to be "free" of something? This article unpacks the chemistry, the step-by-step process, the critical importance of anhydrous (water-free) acetone, and the risks involved.
If the objective is to clean a property or surfaces contaminated by residue, there are methods that do not rely on acetone: washing meth with acetone free
Repeat the wash 2–3 times with fresh, cold anhydrous acetone until the filtrate runs clear (no yellow or white residue). The most common method for removing these water-soluble