4-CL-PVP CRYSTAL is closely connected in composition to the favored substituted cathinone α-PVP. Α-PVP by itself was initial created while in the 1960s. It rose to common recognition among cathinone aficionados in 2013 to be a material that had consequences remarkably much like the stimulant MDPV (Methylenedioxypyrovalerone). The two of these