Ethinylestradiol CAS 57-63-6

Ethinylestradiol , Promotion Season Now in Store and Free Sample for Testing with Factory Price

Chemical Name: Ethinylestradiol
CAS No.: 57-63-6
Molecular Fomula: C20H24O2
Molecular weight:296.41
Appearance: neat
Sample: Available

Ethinylestradiol CAS# 57-63-6

Description of Ethinylestradiol

eed, 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.
Transdermal ethinyl estradiol carries a greater risk of clot formation and venous thromboembolism than naturally occurring 17β-estradiol, which some have theorized to be related to different amounts of hepatic metabolism after absorption. The same contraindications and precautions apply for EE2 as with other estrogen medications.

Basic Info of Ethinylestradiol

Chemical Name



eed;17alpha-ethynylestradiol;LYNORAL;19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, (17α)-;eed;



Molecular Formula


Molecular Weight






Safety Info



Safety Statements


HS Code


WGK Germany


Risk Statements

R45; R22

Hazard Codes


Signal Word


Caution Statement

P201; P308 + P313


GHS07, GHS08

Hazard Declaration

H302; H350


Appearance & Physical State

Off-White to Light-Yellow Crystalline Powder



Boiling Point

457.2ºC at 760mmHg

Melting Point


Flash Point


Refractive Index

-30 ° (C=0.4, Pyridine)

Storage Condition

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Numbering system



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What is Ethinylestradiol?

With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is eed which has developed particularly rapidly in recent years. Do you know about eed?

The official answer:eed is an orally bioavailable estrogen used in the formulation of almost all modern compounded oral contraceptive pills. In two cultured rat hepatocytesandHepG2 cells, EthinylEstradiol increased respiratory chain activity.eed is a strong promoter of liver cancer formation. In female rat liver, EthinylEstradiol increased the transcriptional levels of genes encoded by the nuclear and mitochondrial genomes and respiratory chain activity; 

What’s the application of Ethinylestradiol?

This product is an oestrogenic drug. It acts like vinyl estradiol, but is 20 times more potent. Used in combination with progestin-based contraception, it has a synergistic effect of inhibiting ovulation, which enhances contraceptive efficacy and reduces side effects such as breakthrough bleeding. It can also be used for menstrual disorders such as amenorrhoea, hypomenorrhoea, menopausal syndrome and uterine hypoplasia. For use in the preparation of contraceptives.


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