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    Methamphetamine after resolution, recrystallization problem

    Teacher, my hydrochloride is clean. I extracted it by petroleum ether and breathed it into hydrogen chloride gas, then dried it. Is pure ethanol OK? Or can you tell us the procedure
  2. @

    Methamphetamine after resolution, recrystallization problem

    I dissolve the powder in dichloromethane, why is the dichloromethane not finished volatilizing is a crystal, volatilizing is finished, dry is a powder
  3. @

    Methamphetamine Isomers Separation by Tartaric Acid

    Teacher d tartaric acid heating is completed, there is no solid reason
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