Phosphitebased
Phosphite-based compounds refer to materials and reagents that incorporate phosphite groups, derived from phosphorous acid (HPO3) or its esters. The term covers two broad classes: organophosphite esters with the structure P(OR)3 and inorganic or organometallic phosphites that contain PO3 units coordinated to metals. In organophosphites, phosphorus is in the +3 oxidation state, whereas many inorganic phosphites involve metal–phosphite motifs or framework structures. Phosphites are distinct from phosphates, which contain phosphorus in the +5 oxidation state.
Organophosphite esters are widely used as stabilizers and antioxidants in polymers. They scavenge radicals and decompose
Inorganic and metal phosphites appear in a variety of materials, including salts and framework-like structures where
Safety and handling depend on specific compounds; many organophosphites are moisture-sensitive and may be irritants or