DOPO (9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) is a high-performance reactive phosphorus-based flame retardant widely used in polymers, coatings, and resin systems. With an assay of ≥99 percent and low impurities, it ensures stable incorporation into polymer matrices and delivers strong, permanent flame-retardant performance through the formation of durable P–C bonds.

Beyond flame retardancy, DOPO provides multifunctional industrial benefits: it acts as a color protection agent in ABS, AS, PP, phenolic, and alkyd resins; serves as a metal chelating agent in specialized formulations; and functions as an organic activator in catalytic systems. Its robust reactivity allows seamless integration with olefins, ketones, epoxy groups, and a wide variety of resin chemistries.

DOPO is commonly selected by manufacturers of electronic materials, epoxy composites, engineering plastics, and polymer intermediates due to its thermal stability, compatibility, and dependable performance.