4-FA

• Systematic (IUPAC) name : (RS)-1-(4-Fluorophenyl)propan-2-amine
• CAS: 459-02-9
• Formula: C9H12FN 
• Mol. mass: 153.20 g/mol

4-FA  (4-Fluoroamphetamine or PAL-303), also known as para-fluoroamphetamine (PFA) is a psychoactive drug and research chemical of the phenethylamine and amphetamine chemical classes. It produces stimulant and entactogenic effects. 4-FA is a relatively rare drug on the illicit market, although it is sometimes sold as a designer drug along with related analogues such as 2-fluoroamphetamine and 4-fluoromethamphetamine, among others.

The subjective effects of 4-FA include euphoria, increased energy, mood elevation, excessive talking, bruxism (jaw clenching), insomnia and suppressed appetite.4-Fluoroamphetamine is a potent stimulant and serotonin releaser as with other para-substituted amphetamine derivatives, but is both significantly less potent as a serotonin releaser and much less neurotoxic than related compounds such as parachloroamphetamine.The dopamine reuptake inhibition produced by 4-FA is stronger than that of either PCA or PIA. 4-FA also produces less hyperthermia than similar compounds such as PMA, 4-MTA and 4-methylamphetamine.Effects begin within an hour after ingestion. Common dose range is 75-150mg, usually taken orally.