MPA ; Methiopropamine 1-(thiophen-2-yl)-2-methylaminopropane CAS: 801156-47-8 C8H13NS Buy MPA Methiopropamine online retail and wholesale cheap Methiopropamine (MPA) is a thiophene ring-based structural analog of methamphetamine originally reported in 1942. MPA is reported to react with Ethylphenidate and MDAI.