fairnymph, I've had the same explantion of cmehs that are mirror images of each other. After a few years, withought application or study, one tends to forget what words like stereoisomers means. From what you said I understand that a stereoisomer is isomer that is indeed a mirror image of it;s <lost for word> (corresponding isomer perhaps).
Eph and pseudoeph, because they are mirror images of eash other (stereoisomers) have very similar physical properites. More important however they react in the same way when...well when the go thru a chemical reaction, right?
Most street amph/meth consists solely of the d isomer
Do you know why that is? Psuedoephedrine reduces to d-methamphetamine. A while back the geniuses in Government made it much more difficult to obtain ephedrine. Most of the restrictions didnt apply to pseudoephedrine so it quickly emerged as a replacement. To this day pseudo is much easier and legal to obtain. Well, ephedrine reduces to d,l-methamphetamine, the weaker. We can all thank the DEA and other gov agencies who played a role in this for significantly increasing the quality of street meth.
P2P was completely banned and I believe is a List I. You here old timers talk of how great meth was when it the P2P route was taken. That's all nonsense as P2P yeilds d,l,-meth as well.
If you get amph/meth that is not very strong...it is probably because some or all of the product is the l isomer ? I know someone who once mistakenly made a batch of l isomer meth.
Besides using a wrong synth how could one end up with nothing but l-meth? No clandestine meth synth will put out a product of exclusive l-methamphetamine, right?
The Snitch rambles when he smokes good meth. Sorry.