This white paper will give an introduction to propylene oxide, its uses, and the major derivative markets. It will outline some of the most utilized methods to manufacture PO with detailed process diagrams: specifically the chlorohydrin (CH-PO), styrene, methyl tert-butyl ether / tert-butyl alcohol (MTBE-PO / TBA-PO), cumene (CU-PO), and hydrogen peroxide (HP-PO) processes. In addition, it will discuss the advantages and benefits for choosing online or inline chemical analysis over manual sampling and offline laboratory methods, with specific examples to increase productivity and save costs while protecting company assets. The white paper contains several online and inline process application solutions for the various PO production methods with related application notes for further information.