Synonyms: Phosphonicacid, cyclic trimethylene ester (8CI); Trimethylene phosphonate ((C3H6O2)HPO)(7CI); Trimethylene phosphonate (6CI); 1,3-Propanediol, cyclic phosphonate(8CI); 1,3-Propanediol cyclic phosphite; 2-Oxo-1,3,2-dioxaphosphorinane;2-Oxo-[1,3,2]-dioxophosphorinane