| Message: | Norethisterone CAS 68-22-4
Synonyms: ENT;NET;Norfor; sc4640;Anovule;Gestest
Molecular Formula: C20H26O2
Formula Weight: 298.42
CAS No.: 68-22-4
Appearance: Fine powder
Packing: 1kg/foil bag
Standards BP2002,EP4
Usage: Progesteron. Norethindrone and acetate in combination with estrogen as contraceptive (oral). It is reasonably anticipated to be a human carcinogen
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Product description:
Norethisterone (or norethindrone) (or 19-nor-17α-ethynyltestosterone) is a molecule used in some combined oral contraceptive pills, progestogen only pills and is also available as a stand-alone drug. It is a progestogen and can be used to treat premenstrual syndrome, painful periods, abnormal heavy bleeding, irregular periods, menopausal syndrome (in combination with oestrogen), or to postpone a period. It is also commonly used to help prevent uterine hemorrhage in complicated non-surgical or pre-surgical gynecologic cases. Norethindrone was the first orally highly active progestin to be synthesized. It was synthesized for the first time by chemists Luis Miramontes, Carl Djerassi, and George Rosenkranz at Syntex in Mexico City in 1951. It was the progestin used in one of the first three oral contraceptives. Its related ester, norethisterone acetate, is used for the same indications
COA:
Product name Norethindrone
Appearance White crystalline powder
Water ¡Ü5% pass
Assay 98 .0~ 102.0% 99.2%
Loss on drying ¡Ü0.5% 0.15%
Related substances total impurities ¡Ü1.0% Pass
any individual impurity ¡Ü0.5% Pass
Residual solvents ethanol ¡Ü0.5% Pass
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