Methiopropamine is a legal research chemical first synthesized in 1942. It is also known as MPA and has been studied in various experiments. MPA continues to be researched for potential medical applications such as treating serious illnesses. MPA is defined chemically as N-methyl-1-(thiophen-2-yl)propan-2-amine. Regulations of research chemicals vary by country, with some banning their sale or possession. MPA is used by scientists for experiments and is being researched for potential medical applications, while some people use it recreationally for its stimulant effects.