Synonyms[3,6-bis[(3-pyridinyl)methyl]-2,5-dihydroxy-2,5-dioxido-1,4,2,5-dioxadiphosphorinane-3,6-diyl]bis[phosphonic acid] disodium tetrahydrate salt; Risedronate Related Compound B Close [3,6-bis[(3-pyridinyl)methyl]-2,5-dihydroxy-2,5-dioxido-1,4,2,5-dioxadiphosphorinane-3,6-diyl]bis[phosphonic acid] disodium tetrahydrate salt; Risedronate Related Compound B Related products Risedronate impurity A M.F. M.W. 646.22 CAT# AR-R09968 CAS# 1486617-90-6 (free acid)