17-Ethinylandrost-5-ene-3,17-diol, also known as ethinylestradiol, is a synthetic estrogen and a component of many combined oral contraceptives. It is a derivative of the naturally occurring hormone estradiol, with an ethinyl group added to the 17th carbon position. Ethinylestradiol is used to regulate menstrual cycles, prevent ovulation, and treat symptoms of menopause. It works by binding to estrogen receptors in the body, which in turn affects the production of sex hormones and the development of secondary sexual characteristics. The chemical structure of 17-Ethinylandrost-5-ene-3,17-diol is characterized by a steroid nucleus with a double bond between the 5th and 6th carbon atoms, and two hydroxyl groups attached to the 3rd and 17th carbon atoms.

5173-84-2

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Basic information
1. Product Name: 17-Ethinylandrost-5-ene-3,17-diol
2. Synonyms: 17-Ethinyl-3,17-dihydroxyandrost-5-ene;17-Ethinylandrost-5-ene-3,17-diol;Pregn-5-en-20-yne-3,17-diol
3. CAS NO:5173-84-2
4. Molecular Formula: C₂₁H₃₀O₂
5. Molecular Weight: 314.46
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 5173-84-2.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: /
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 17-Ethinylandrost-5-ene-3,17-diol(CAS DataBase Reference)
10. NIST Chemistry Reference: 17-Ethinylandrost-5-ene-3,17-diol(5173-84-2)
11. EPA Substance Registry System: 17-Ethinylandrost-5-ene-3,17-diol(5173-84-2)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 5173-84-2(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 5173-84-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,1,7 and 3 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 5173-84:
(6*5)+(5*1)+(4*7)+(3*3)+(2*8)+(1*4)=92
92 % 10 = 2
So 5173-84-2 is a valid CAS Registry Number.

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