Quote from: iisthisisi on December 02, 2012, 08:08 pmdl-amph is regular speed. The dl stands for dextro levo. These terms represent the rotation of the chiral carbon in the molecule. This product is almost always made from phenyl-2-propanone. This yields the racemic molecule.For further details about chiral carbons and stuff, visit Wiki. Or acs.pubs if you have access to them. Dextro is made from the HI/P reduction of pseudonorephedrine. Because this substance does already have the chiral carbon in the right rotation, all you need to do is kick that bloody OH on the alpha carbon and you have the dextro.I sense an opportunity for a lesson: why exactly does the pseudonorephedrine have only the one and not the other, when I'd expect any process that reduced (whatever it was) to pseudonorephedrine would leave you with 50/50 -- statistical probabilities and all? I mean what drives the imbalance toward one side? Or is it just a matter of separating post-reduction? (unless it's made via synth... but, that wouldn't make financial sense... yes? No?)C'mon, Muslix. You too. I know you've got a touch of patience I can squeeze out of you, don't you? ;)Edit: please do bear in mind that a good teacher is invaluable -- Google and all that are the pinnacle of human civilization, but someone that can really convey knowledge well is invaluable -- hence my questioning of someone who apparently can. I don't mean to try and make you do my learning for me, please don't take it that way.