SPL Set ID: 2fc17ba3-83c7-a2b4-8a75-6a0cb1e07682

1 DESCRIPTION Fulvestrant injection for intramuscular administration is an estrogen receptor antagonist. The chemical name is 7-α-[9-(4,4,5,5,5-penta fluoropentylsulphinyl) nonyl]estra-1,3,5-(10)- triene-3,17β-diol. The molecular formula is C 32 H 47 F 5 O 3 S and its structural formula is: Fulvestrant is a white powder with a molecular weight of 606.77. The solution for injection is a clear, colorless to yellow, viscous liquid. Each injection contains as inactive ingredients:12% v/v of absolute alcohol at 60°F (15.56°C); 10% w/v Benzyl Alcohol, NF, and 15% w/v Benzyl Benzoate, USP as co-solvents, and made up to 100% w/v with Castor Oil, USP as a co-solvent and release rate modifier.