The optical resolution of racemic amphetamine/methamphetamine has been known for years. https://erowid.org/archive/rhodium/chemistry/amphetamine.res... What has surprised me is how infrequently it seems to be carried out, given the materials required for it. This is all you need: - D-Tartaric Acid (You can buy it from import sites in bulk for $30-60/kg) - Lye/Sodrium Hydroxide - Ethanol/Everclear (if you're convertin…
> The process is stupid-simple and takes a matter of hours, any idiot could do it, and the difference it makes in effects (racemic vs optically-pure D-Amphetamine vs D-Methamphetamine) is obscene (My organic chemistry is very rusty, and my knowledge of amphetamines is non-existant.) I'm assuming from what you wrote that the D- enantiomer is one you want. What does the L- enantiomer do, if anything?
Vicks Vapor rub/inhalers and other decongestants use L-methamphetamine. The D-enantiomer causes CNS stimulation. The L-enantiomer causes only PNS (Peripheral Nervous System) stimulation, so it produces no euphoria or enjoyable effects.
Only unpleasant side effects, like tachycardia and anxiety, etc.
This is why racemic amphetamine/methamphetamine is so (comparatively) unpleasant, and the pure D-enantiomer is superior and "cleaner" feeling.
Racemic amphetamines have a much higher chance of inducing psychosis.