Phosphorus

Phosphorus (CAS 7723-14-0), commonly supplied in its red or amorphous form, is a reactive non-metallic element used as a base material in flame retardant systems and specialty chemical synthesis. It serves as a precursor to phosphoric acid, phosphine, and a broad range of organophosphorus compounds that underpin industrial fire protection and materials processing across various sectors.

In plastics and polymer manufacturing, amorphous phosphorus is incorporated into intumescent and halogen-free flame retardant formulations for engineering resins, cable jacketing, and electronic housings. The electronics industry relies on phosphorus-derived compounds for flame retardant printed circuit board laminates and semiconductor dopant applications to ensure safety and performance standards.

Aerospace and defense sectors source it for pyrotechnic compositions and smoke-generating agents used in signaling and obscurant systems, requiring high reliability and specific chemical properties. In mining and metals processing, it functions as a reducing agent and alloying additive to modify steel and cast iron properties, enhancing the durability and strength of the final metal products.

Amorphous (red) phosphorus is the standard commercial form, supplied as a fine powder or stabilized granules to reduce reactivity during handling and transport for safer industrial operations. Technical and industrial grades are the primary market offerings, with purity levels typically ranging from 98% to 99.9% depending on end-use requirements and specific manufacturing protocols.