Abstract: This disclosure provides systems and methods for the on-demand synthesis, separation, purification and formulation of chemicals, and particularly for the on-demand production of pharmaceutical products. More particularly, the disclosure provides continuous-flow on-demand systems, comprising one or more reagent holding/dispensing containers, continuous-flow chemical synthesis modules and/or one or more separation, crystallization, filtration, wash and/or formulation modules, additionally comprising automated detection systems and methods for monitoring reagents, products and processing parameters and automated control systems and methods for controlling processing conditions and parameters.