3A or 4A molecular sieves are synthetic zeolites with microscopic pores that trap water molecules but allow acetone to pass. The sieves are baked in an oven at 300°C to drive off absorbed water, then added to acetone. After 24-48 hours, the acetone is effectively dry.
Several acetone-free methods have been reported for washing methamphetamine: washing meth with acetone free
: Many impurities in illicit methamphetamine are soluble in acetone but not in the drug's hydrochloride salt form. Acetone-free removers typically use solvents like ethyl acetate or isopropyl alcohol, which have different solubility profiles and may not target the same impurities or could inadvertently dissolve the methamphetamine itself. 3A or 4A molecular sieves are synthetic zeolites
If you or someone you know is struggling with substance use, professional resources are available: SAMHSA’s National Helpline: Several acetone-free methods have been reported for washing