MAPD stands for Methylacetylene-Propadiene. It refers to a mixture of two C₃ unsaturated hydrocarbons: methylacetylene (also called propyne, CH₃C≡CH) and propadiene (also called allene, H₂C=C=CH₂). These compounds are structural isomers (same molecular formula, C₃H₄) and often coexist in equilibrium, especially in industrial contexts.

#mapd  #methylacetylene  #propyne  #propadiene  #allene