Suramin sodium: C~51~H~34~N~6~Na~6~O~23~S~6~. Mw: 1429.17. (1) 1,3,5-Naphtalenetrisulfonic acid, 8,8′-[carbonylbis[imino-3,1-phenylene)carbonylimino]]bis-,hexasodium salt; (2) Hexasodium 8,8′-[ureylenebis[m-pheylenecarbonylimino(4-methyl-m-phenylene)carbonylimino]]di-1,3,5-naphtalenetrisulfonate. CAS-129-46-4; CAS-145-63-1 (suramin).