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Pharmacology - How to tell the difference between l-methamphetamine and d-methamphetamine?

Discussion in 'Methamphetamine' started by Atsu, Mar 27, 2013.

  1. Atsu

    Atsu Silver Member

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    How can someone test meth that's bought off the street and tell whether it is l-methamphetamine or d-methamphetamine?
    Is there a way to test your meth so you can tell which it is besides consuming it?
    Do testing kits tell you this?

    Thanks,
    Atsu.
     
  2. pokerplayerlv

    pokerplayerlv Newbie

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    Google revealed l meth is an ingredient in a Vicks vapor preparation and is non psychoactive -- an unlikely candidate to be found on the street.
     
  3. Boltzmann

    Boltzmann Titanium Member

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    But often enough d,l-methamphetamine and d-methamphetamine would both be found on the street, and to suit one's preference, that differentiating would be desirable.
     
  4. Docta

    Docta Idiot Savant

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    I don't think it would be feasible to do but there are in my opinion only two realistic options:
    1. Chiral resolution
    2. Angle of rotation

    First option is performing a chemical reaction called a racemic resolution where a solvent separation is performed making one of the enantiomers insoluble via a chiral resolving agent. This is obviously unrealistic and any such discussion would have to take place in the chemistry section.

    Second option is constructing a devise call a Polarimeter that will identify l-methamphetamine from d-methamphetamine. If a simple light tube could be constructed with two polarized lenses crossed at 90[sup]o[/sup] with respect to one another light would pass strait through to the eye peace but if a sample of meth was put in the light tube between the lenses, carried in a optically inactive solvent it would rotate the plane of polarized light entering the tube. If the plane of polarization is rotated to the right, the sample is dextrorotatory; If to the left, levorotatory.

    Getting two small polarized lenses would be the first thing then there's the question of the light source. The degree to which the plane of polarization is rotated by any sample is highly dependent on the wavelength of the light so a monochromatic light source would be needed such as a sodium lamp. I know this is all a bit pie in the sky but hell wouldn't it be great to make one out the body of a Mag-Lite.

    [​IMG]
     

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  5. RoboCodeine7610

    RoboCodeine7610 Silver Member

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    No need to test it.

    If the methamphetamine was reduced from pseudoephedrine, it's d-methamphetamine in it's entirety.It's quite unusual to find meth prepared from any other precursor.

    Other methods are no longer in use because of the difficulty in attaining the precursors needed and the simplicity of the reduction of pseudoephedrine, which is basically one step away from making krocodril (if you don't know what it is, you're better off).

    The meth you're getting is the d isomer, plus the various unidentified substances it's cut with.There are numerous purification techniques that will not only make your meth purer, but remove impurities that can be directly harmful to your health.You should be able to find these using the search engine.

    Robo
     
  6. TheMoleculeMan

    TheMoleculeMan Silver Member

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    This isn't entirely true. A good portion of the methamphetamine circulating in my area is synthesized from phenyl-2-propanone (P2P). This is largely because the Mexican drug cartels that flood the region with their product are adapting to chemical restrictions. Since P2P is ideal for large-scale production, this is what drug cartels commonly use to manufacture methamphetamine.

    Also, I'm assuming you meant "krokodil" (крокодил) which, you're absolutely right, is pretty similar to the synthesis of pseudoephedrine methamphetamines.
     
  7. RoboCodeine7610

    RoboCodeine7610 Silver Member

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    I was unaware.But a P2P cook would probably yield a mix of both isomers.Are there any identifying characteristics of meth coming from Mexico?

    RoboCodeine7610 added 0 Minutes and 41 Seconds later...

    Also, you speak Russian? Cool.
     
    Last edited: Mar 29, 2013
  8. Boltzmann

    Boltzmann Titanium Member

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    This is where the d,l-methamphetamine I mentioned originates, mostly.
     
  9. TheMoleculeMan

    TheMoleculeMan Silver Member

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    Oh I agree, I was just expanding on your post by offering secondhand knowledge of the drug trade. As for the characteristics of P2P methamphetamine, I have to agree with Docta in that "...any such discussion would have to take place in the chemistry section." However, I can tell you this: P2P methamphetamine is commonly referred to as "ice." ;)
     
  10. RoboCodeine7610

    RoboCodeine7610 Silver Member

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    Well it's irrelevant, in any case, as purity has a lot more to do with potency than weather it's only racemic meth or not.If you're getting pure enough meth (think shabu) then it makes sense to compare the two_Otherwise, purity is pretty much everything.

    Robo

    RoboCodeine7610 added 3 Minutes and 7 Seconds later...

    What I don't understand however, is this:

    If there are vics, oxys, roxys, percocets and valiums out in the street, how come I never hear of Desoxyn being sold out there?I mean, it is pharmaceutical-grade methamphetamine.
     
    Last edited: Mar 29, 2013
  11. TheMoleculeMan

    TheMoleculeMan Silver Member

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    It's the Holy Grail of prescriptions, that's why. Doctors and physicians are reluctant to prescribe something that has a social stigma like methamphetamine has attached to it. Furthermore, it really doesn't have too many practical uses like levo/dextroamphetamine (Adderall) does.
     
  12. Boltzmann

    Boltzmann Titanium Member

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    It's a lot easier to fake back pain than morbid obesity.
     
  13. TheMoleculeMan

    TheMoleculeMan Silver Member

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    Disturbingly enough, this too. It's way too easy to walk out of an MDs office with a prescription for oxycodone without any buffer if you claim it upsets your stomach and you don't have a history of drug abuse. It's a cake walk to get a prescription for the 5/325s- they hand those out like candy.
     
  14. RoboCodeine7610

    RoboCodeine7610 Silver Member

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    I see.

    I just figured it had little to do with legitimate prescription, as most oxycodone sold in the street comes from "pain clinics" with a big sign on the door that say "no insurance, cash only".

    I also think the low level of difficulty in it's synthesis probably has something to do with it.After all, it's not that difficult to cook almost pharmaceutical grade methamphetamine yourself.

    Robo
     
  15. LaFolle

    LaFolle Silver Member

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    Would the prevalence of the new ISO dope everywhere have anything to do with this? Meaning, is l-amphetamine similar/the same as or mixed with N-Iso &/or the other amyl substances?