Phosphorus-containing epoxy resins incorporate phosphorus-based compounds into their formulation. These resins often exhibit flame-retardant properties, making them suitable for applications where fire resistance is crucial. The addition of phosphorus compounds in epoxy resins can enhance their flame-retardant capabilities and reduce the risk of ignition and flame spread. This makes phosphorus-containing epoxy resins valuable in industries such as electronics, aerospace, and construction, where fire safety is a priority.