Ethinyl estradiol, also sometimes written as 17α-ethinyl estradiol, ethinylestradiol, ethynyl estradiol, or ethinyl œstradiol, is a derivative of 17β-estradiol (E2), the major endogenous estrogen in humans. EE2 is an orally bioactive estrogen used in many formulations of combined oral contraceptive pills and is one of the most commonly used medications for this purpose.

CAS：54048-10-1
中文别名：3-酮去氧孕烯;3-酮-去氧孕烯;
英文别名：Etonoestrel;3-Keto-desogestrel 3-Oxo-desogestrel;[3H]-3-keto-Desogestrel;Etonogestrel;3-oxodesogestrel;Implanon;3-keto-Desogestrel;org3236;3-Ketodesogestrel,3-Oxodesogestrel,Org-3236,Implanon;Desogestrel Related Compound C (25 mg) (3-Keto-desogestrel);
分子式：C22H28O2
分子量：324.457
精确质量：324.209
Psa：37.3
Logp：4.0487

UNII：304GTH6RNH

外观与性状：白色或近乎于白色结晶粉末
密度：1.13 g/cm3
沸点：473.1ºC at 760 mmHg
熔点：182-184ºC
闪点：201.1ºC
折射率：1.574
储存条件：-20ºC

信号词：Danger
危险性防范说明：P201; P281; P308 + P313
危险性描述：H351; H360
危险标志：GHS08