RDN03N: Risedronate EP Impurity C (Na)

[1-Hydroxy-2-(pyridin-4-yl)ethylidene]bis(phosphonic acid) monosodium salt ;

CAS # 105462-25-7 (acid) ;

C7H11NO7P2 (acid) ; Mol. Wt.: 283.11 ;

C7H10NNaO7P2 (monosodium salt) ; Mol. Wt.: 305.09 ;