CAS 823-31-4 appears in our catalog under these names: 2-Ethoxy-1,3,2-dioxaphospholane 2-Oxide, >95.0%(GC), ETHYL ETHYLENE PHOSPHOLANE MONOMER, 2-Ethoxy-1,3,2-dioxaphospholane 2-oxide, 98%, 98%, 2-ETHOXY-1,3,2-DIOXAPHOSPHOLANE 2-OXIDE, 95%. Offered by: TCI, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 1g, 5g, 100mg, 250mg.