4-Fluoroamphetamine (4-FA; 4-FMP; PAL-303; “Flux“), also known as para-fluoroamphetamine (PFA) is a psychoactive research chemical of the phenethylamine and substituted amphetamine chemical classes.

It produces stimulant and entactogenic effects, and is described subjectively as being between amphetamine and MDMA. As a recreational drug, 4-FA is sometimes sold along with related compounds such as 2-fluoroamphetamine and 4-fluoromethamphetamine.

Product Name: 4-Fluoroamphetamine
Cas No: 459-02-9
Formula: C9H12FN
Appearance: White crystals
Purity: above 98.5%