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racemic    
a. 外消旋的

外消旋的

Racemic \Ra*ce"mic\ (r[.a]*s[=e]"m[i^]k), a. [Cf. F.
rac['e]mique. See {Raceme}.] (Chem.)
Pertaining to, or designating, an acid found in many kinds of
grapes. It is also obtained from tartaric acid, with which it
is isomeric, and from sugar, gum, etc., by oxidation. It is a
sour white crystalline substance, consisting of a combination
of dextrorotatory and levorotatory tartaric acids. --Gregory.
[1913 Webster]

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  • Meth - Is crystal meth pure dextro-methamphetamine? Can racemic meth . . .
    Racemic methamphetamine wouldn't form nice clear shards like one would expect from enantiomerically pure d-methamphetamine, but they would probably form opaque chunks or rock like clusters However d-meth with some smaller proportions of l-methamphetamine can form what people would describe as "crystal meth", as discussed here:
  • dextroamphetamine in relation to amphetamine - bluelight. org
    Would I have started with an gram of street dex-amphetamin instead of racemic I would have experienced equally, maybe even better, effects Guess I kinda forget how good the human body is in addapting to something after continuess administration
  • Stimulants - Is mexican meth mostly racemic? | Bluelight. org
    This "racemic Mexican meth" misinformation has been debunked ad nauseum on this forum over the last couple years See this paper for a full discussion Essentially, it is being produced from P2P but is then being resolved using tartaric acid The dea lab guy said that his seeing more and more lazy cooks that havnt been removing the levo
  • Dissociatives - [Ketamine Subthread] Isomers: R and S Ketamine
    If I take the racemic I can distinguish the parts of the effects that can be attributed to the isomers My source was an excellent one, the purity of both was also the best I ever saw Merging into the K isomer subthread Also, if you disagree that S- (+)-ketamine is more anaesthetic and gentle take a look at the complete first page of this thread
  • Meth - Youve never had racemic methamphetamine
    The dreaded racemic batch; a 50 50 mixture of the dextrorotary and levorotary methamphetamine isomers often abbreviated simply d-meth and l-meth (sometimes R-meth and S-)meth
  • (Methamphetamine) Racemic vs Dextro For ADHD? - Bluelight. org
    I have access to racemic meth (I can absolutely confirm it is racemic, let's just leave it at that) and I am wondering if racemic is better, similar to add medications like Adderall, or is the dextro enantiomer better? The doses would not be recreational, just for adhd
  • Stimulants - The Complete Lay Guide To Dextro- Levo- Meth (L-,D . . .
    Amphetamine Sulfate is usually what they call the 1:1 racemic mixture As far as the racemic amphetamine paste goes, depending on purity, should be a 50% Dextro and 50% Levo It's drug profile is pretty close to Adderall for dosing and effects It will be a little more jittery though Note from my coauthor Sssnake: My personal experience with the paste was mid 90's in Ireland It was a pretty
  • Stimulants - Methamphetamine - D-Meth vs Racemic
    It isn’t actually So when it comes to methamphetamine certain synthesis routes, which are rather easy, produce pure d-meth For many years d-meth was the primary form due to this Lately it’s possible some super labs are producing racemic but you can bet a large portion of the market is still high purity d-meth Amphetamine is a different beast and more likely to be racemic because it’s
  • Harm Reduction - So I finally figured out a way to separate cut . . .
    Yes they synthesize racemic and then resolve to d-meth Tartaric acid makes this easy The DEA reports showing small amounts of l-meth to varying degrees over the last decade that the route is indeed racemic Now the l-meth isn’t thrown away It can actually be turned into racemic product via a route I’ve talked about on here before





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