Product Name: Formoterol Fumarate Chemical Name: (÷)-2-hydroxy-5-[(1RS)-1-hydroxy-2-[[(1RS)-2-(4-methoxyphenyl)-1-methylethyl]- amino]ethyl]formanilide fumarate dihydrate; CAS No.: 43229-80-7 Molecular Formula: (C19H24N2O4)2·C4H4O4·2H2O Molecular Weight: 460.48 Specifications: Appearance: White to yellowish crysralline powder Assay: 99%min.