The Acting Administrator of the Drug Enforcement Administration (DEA) is issuing this temporary scheduling order to schedule the synthetic cathinones, N-ethylhexedrone (2-(ethylamino)-1- phenylhexan-1-one); alpha-pyrrolidinohexanophenone (1-phenyl-2- (pyrrolidin-1-yl)hexan-1-one; alpha-pyrrolidinohexiophenone; trivial name: [alpha]-PHP); 4-methyl-alpha-ethylaminopentiophenone (2- (ethylamino)-1-(4-methylphenyl)pentan-1-one; trivial name: 4-MEAP); 4'- methyl-alpha-pyrrolidinohexiophenone (1-(4-methylphenyl)-2-(pyrrolidin- 1-yl)hexan-1-one; 4'-methyl-alpha-pyrrolidinohexanophenone; trivial name: MPHP); alpha-pyrrolidinoheptaphenone (1-phenyl-2-(pyrrolidin-1- yl)heptan-1-one; trivial name: PV8); and 4'-chloro-alpha- pyrrolidinovalerophenone (1-(4-chlorophenyl)-2-(pyrrolidin-1-yl)pentan- 1-one; 4'-chloro-alpha-pyrrolidinopentiophenone; trivial name: 4- chloro-[alpha]-PVP), and their optical, positional, and geometric isomers, salts, and salts of isomers in schedule I. This action is based on a finding by the Acting Administrator that the placement of these synthetic cathinones in schedule I of the Controlled Substances Act is necessary to avoid an imminent hazard to the public safety. As a result of this order, the regulatory controls and administrative, civil, and criminal sanctions applicable to schedule I controlled substances will be imposed on persons who handle (manufacture, distribute, reverse distribute, possess, import, export, research, or conduct instructional activities or chemical analysis), or propose to handle, N-ethylhexedrone, [alpha]-PHP, 4-MEAP, MPHP, PV8, and 4-chloro- [alpha]-PVP.