Anastrozole Arimidex (CAS No.:120511-73-1) CAS: 120511-73-1 Assay: 98.0%--102.0%. USP32 Packing: 1Kg/foil bag. Delivery: Courier. MF: C17H19N5 MW: 293.37 Character: White crystalline powder. MP: 81-82degC. Usage: An aromatase inhibitor. Used as an antineoplastic raw materials. Potent selective triazole aromatase inhibitors, can inhibit the cytochrome P-450 aromatase enzyme which depends blocking the biosynthesis of estrogen, and estrogen to stimulate breast cancer cell growth factors. Treatment of breast cancer, especially for those with hormone relapse after adjuvant therapy after menopause for women with advanced breast cancer.