SKF 83566 hydrobromide is primarily used in research settings as a selective dopamine D1 receptor antagonist. It is widely applied in neuropharmacological studies to investigate the role of dopamine D1 receptors in various brain functions, including cognition, motor control, and reward mechanisms. Researchers utilize this compound to block D1 receptor activity, helping to elucidate the receptor's involvement in behavioral and physiological processes. Additionally, it is employed in experimental models to study the effects of D1 receptor inhibition on conditions such as Parkinson's disease, addiction, and schizophrenia, providing insights into potential therapeutic targets. Its specificity for D1 receptors makes it a valuable tool for understanding dopamine-related pathways and their impact on neurological and psychiatric disorders.