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CAS: 56-53-1 Des or Diethylstilbestrol in High Quality Product Description Diethylstilbestrol CAS: 56-53-1 DES or Diethylstilbestrol in High Quality CAS: 56-53-1 Assay: 98% EINECS: 200-278-5 Molecular Formula: C18H20O2 Molecular Weight: 268.35 Melting Point: 170-172 ° C Appearance: Light yellow powder. Usage: Pharmaceutical intermediates. Description: Diethylstilbestrol (DES, former BAN stilboestrol) is a synthetic nonsteroidal estrogen that was first synthesized in 1938. It is also classified as an endocrine disruptor. Human exposure to DES occurred through diverse sources, such as dietary ingestion from supplemented cattle feed and medical treatment for certain conditions, including breast and prostate cancers. From about 1940 to 1971, DES was given to pregnant women in the mistaken belief it would reduce the risk of pregnancy complications and losses. In 1971, DES was shown to cause a rare vaginal tumor in girls and women who had been exposed to this drug in utero. The United States Food and Drug Administration subsequently withdrew DES from use in pregnant women. Follow-up studies have indicated that DES also has the potential to cause a variety of significant adverse medical complications during the lifetimes of those exposed. The United States National Cancer Institute recommends women born to mothers who took DES undergo special medical exams on a regular basis to screen for complications as a result of the drug. Individuals who were exposed to DES during their mothers' pregnancies are commonly referred to as "DES daughters" and "DES sons". 中文同义词：(E)-4,4'-(1,2-二乙基-1,2-亚乙烯基)双苯酚;己烯雌酚 CAS号：56-53-1 EINECS号： 200-278-5 含量：99% 分子式：C18H20O2 分子量：268.35 分子结构式: 包装：1kg/听 密度： 1.107g/cm3 熔点： 169-175℃ 沸点： 407.1°C at 760 mmHg 闪点： 187°C 水溶性： PRACTICALLY INSOLUBLE 蒸汽压： 3.29E-07mmHg at 25°C 外观：白色至类白色结晶性粉末。 用途：属激素类药。 用途：主要用于雌激素低下症及激素平衡失调引起的功能性出血、闭经，还可用于死胎引产前，以提高子宫肌层对催产素的敏感性。 乙烯雌酚，也称为乙底酚。作用较强
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