High Purity Piperazine Pyrophosphate IFR-PAP01 Halogen Free Flame Retardant Looking for a reliable halogen free intumescent flame retardant for polymer modification? IFR-PAP01 (Piperazine Pyrophosphate) is your ideal choice. This eco-friendly flame retardant integrates carbon source and acid source in its molecular structure, and can be formulated with proper gas source additives to build a top-tier intumescent flame retardant system. It helps PP, PE, TPE and other