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Chemical name 3,4-methylenedioxy-N,N-dimethylamphetamine or
Chemical formula C12H17NO2
CAS number 74698-50-3
Molecular mass 207.27 g/mol
Melting point 172-173°C

MDDM, or 3,4-methylenedioxy-N,N-dimethylamphetamine, is a lesser-known psychedelic drug. It is also the N,N-dimethyl isomer of MDA. MDDM was first synthesized by Alexander Shulgin. In his book PiHKAL (Phenethylamines I Have Known and Loved), the dosage is unspecified, and the duration unknown. MDDM produces only mild effects that are not well characterised in PiHKAL. Very little data exists about the pharmacological properties, metabolism, and toxicity of MDDM. This compound is however occasionally encountered as an impurity in MDMA which has been synthesized by methylation of MDA using methylating reagents such as methyl iodide, as an excess of reagent or too high a reaction temperature results in some double methylation of the amine nitrogen, yielding MDDM as well as MDMA. Presence of MDDM as an impurity can thus reveal which synthetic route was used to manufacture seized samples of MDMA.

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