3,3:17,17-bis(ethylenedioxy)oestr-5(10)-en-6β-ol, 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 the addition of two ethylene oxide groups to the 3 and 17 positions. Ethinylestradiol is approximately 100 times more potent than estradiol and is used to prevent ovulation, making it an effective contraceptive. It is also used in hormone replacement therapy and to treat certain conditions like acne and heavy menstrual bleeding. The chemical structure of ethinylestradiol allows it to have a longer duration of action and greater bioavailability compared to natural estrogens, which is why it is preferred in pharmaceutical formulations.

1246-95-3

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Basic information
1. Product Name: 3,3:17,17-bis(ethylenedioxy)oestr-5(10)-en-6β-ol
2. Synonyms:
3. CAS NO:1246-95-3
4. Molecular Formula:
5. Molecular Weight: 376.493
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 3,3:17,17-bis(ethylenedioxy)oestr-5(10)-en-6β-ol(CAS DataBase Reference)
10. NIST Chemistry Reference: 3,3:17,17-bis(ethylenedioxy)oestr-5(10)-en-6β-ol(1246-95-3)
11. EPA Substance Registry System: 3,3:17,17-bis(ethylenedioxy)oestr-5(10)-en-6β-ol(1246-95-3)
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: 1246-95-3(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 1246-95-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,4 and 6 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1246-95:
(6*1)+(5*2)+(4*4)+(3*6)+(2*9)+(1*5)=73
73 % 10 = 3
So 1246-95-3 is a valid CAS Registry Number.

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2208-12-0 6-dehydro-oestrone

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