Ethinylestradiol impurity 1

Catalog No.: A99982
Drug Impurity
Ethinylestradiol impurity 1, also known as 9,11-Dehydro ethynyl estradiol, is a derivative and impurity of the synthetic estrogen Ethinylestradiol. This compound is used primarily as a reference standard in the quality control of pharmaceutical formulations containing Ethinylestradiol. Its presence can affect the overall efficacy and safety profiles of estrogen-based therapies, making it critical for analytical testing in drug development and regulatory compliance.
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Adooq Products cited in reputable paper
Science VOLUME 380, ISSUE 6663 (2023)
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Cell Vol. 185 Issue 23 p4428-4447.e28
Cell Vol 177, Issue 7, p1933-1947.e25
Cell Vol 156, Issue 5, p857-1114
Nature Volume 622 Issue 7982 (2023)
Nature volume 620, pages890-897 (2023)
Nature volume 610, pages540-546 (2022)
Nature volume 588, pages83-88 (2020)
Nature volume 574, pages268-272 (2019)
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Nature volume 551, pages639-643 (2017)
Nature volume 551, pages247-250 (2017)
Nature volume 548, pages356-360 (2017)
Nature volume 545, pages187-192 (2017)
Biological Activity
DescriptionEthinylestradiol impurity 1, also known as 9,11-Dehydro ethynyl estradiol, is a derivative and impurity of the synthetic estrogen Ethinylestradiol. This compound is used primarily as a reference standard in the quality control of pharmaceutical formulations containing Ethinylestradiol. Its presence can affect the overall efficacy and safety profiles of estrogen-based therapies, making it critical for analytical testing in drug development and regulatory compliance.
Product Information
Catalog NumA99982
FormulaC20H22O2
Molecular Weight294.39
CAS Number1231-96-5
SMILESC[C@@]12[C@]([C@]3(C(=CC1)C=4C(CC3)=CC(O)=CC4)[H])(CC[C@]2(C#C)O)[H]
Synonyms9,11-Dehydro ethynyl estradiol
Useful Calculator

This calculator helps you calculate mass of compound based on solution concentration, volume and molecular weight in a specific solution using the formula:

Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)

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Please check COA/MSDS for correct molecular weight.

Calculate the dilution required to prepare a stock solution.
This equation is commonly abbreviated as: C1V1 = C2V2

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