Author Topic: is this d-ephedrine hcl or l-ephedrine hcl?  (Read 765 times)

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borolithium

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is this d-ephedrine hcl or l-ephedrine hcl?
« on: December 28, 2003, 06:36:00 PM »
A friend of mine came up with a few hundred grams of ephedrine which was apparently diverted from a chemical supplier.

A melt point test showed that it was a pure substance that melts consistently at 216 - 217 degrees celcius. There is one article on Rhodium's site that states that this is the d-ephedrine, as the l-ephedrine melts at 220 - 221 degrees celcius.

https://www.thevespiary.org/rhodium/Rhodium/chemistry/ephedrineref.html



The problem is that there is another article on Rhodium's site that claims that the naturally occuring ephedrine (l-ephedrine) melts at 216 - 217 degrees celcius, while making no mention of the d-ephedrine.

https://www.thevespiary.org/rhodium/Rhodium/chemistry/comparison.ephedrines.html



Now, the crystals are not needles but rather rectangular crystals, although I would certainly describe them a prismatic.

When they were dreamed up into a Red/HI scenario by someone who has done this many times and yielded 65%, the yield instead came out around 50%. The process was repeated and the same result occured. It also appeared that the quality of the product was less than expected. I had thought that the use of d-ephedrine would result in a l-meth, d-meth mix, with the l-meth being the predominant isomer. This would account for the relative weakness of the end product.

I have used the search engine quite a bit on this issue but it appears that this topic has not been discussed much, likely because few people encounter d-ephedrine. Any thoughts? The only posts I have pulled up have said don't use it.