Selective estrogen ERB receptor antagonist that displays 36-fold selectivity over ERa. Exhibits full antagonism at ERB in a cotransfection assay in human endometrial cancer cells (HEC-1), with minimal effects on ERa.Solubility:To 33mM in DMSO and to 100mM in ethanolTLC:Rf = 0.33 (Diethyl ether: Petroleum ether [2:1]Method for Determining Identity:Proton NMR Spectroscopic and Mass Spectrometric AnalysisElemental Analysis:Calculated: %C: 56.75, %H: 2.62, %N: 9.93Storage and Stability:Stored at RT. Stable for 6 months after receipt. For maximum recovery of product, centrifuge the original vial prior to removing the cap.Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. Toxicity and Hazards: All products should be handled by qualified personnel only, trained in laboratory procedures.