Bisphenol AF-d 4 is the isotope labelled analog of Bisphenol AF. Bisphenol AF is a full agonist for the estrogen receptor. Bisphenol AF acts as an endocrine-disrupting chemical (EDC), activating estrogen through the estrogen receptor Era. Bisphenol AF-d 4 can be used for the research of endocrinology and cancer.