4-Ethylphenethylamine is primarily utilized in research settings for its potential psychoactive properties. It is often studied for its effects on the central nervous system, particularly in relation to neurotransmitter activity. Researchers explore its interactions with serotonin and dopamine receptors to better understand its behavioral and physiological impacts. Additionally, it is sometimes used as a reference compound in the development of novel pharmacological agents targeting mood and cognitive disorders. Its applications are largely confined to academic and scientific investigations rather than commercial or industrial use.