NorethisteroneCAS68-22-4Synonyms:ENT;NET;Norfor;s***640;Anovule;GestestMolecularFormula:C20H26O2FormulaWeight:298.42CASNo.:68-22-4Appearance:FinepowderPacking:1kg/foilbagStanda***BP2002,EP4Usage:Progesteron.Norethindroneandacetateincombinationwithestrogenascontraceptive(oral).ItisreasonablyanticipatedtobeahumancarcinogenProductdescription:Norethisterone(ornorethindrone)(or19-nor-17α-ethynyl***)isamoleculeusedinsomecombinedoralcontraceptivepills,progestogenonlypillsandisalso***ailableasastand-alonedrug.Itisaprogestogenandcanbeusedtotreatpremenstrualsyndrome,painfulperiods,abnormalhe***ybleeding,irregularperiods,menopausalsyndrome(incombinationwithoestrogen),ortopostponeaperiod.Itisalsocommonlyusedtohelppreventuterinehemorrhageincomplicatednon-surgicalorpre-surgicalgynecologiccases.Norethindronewasthefirstorallyhighlyactiveprogestintobesynthesized.ItwassynthesizedforthefirsttimebychemistsLuisMiramontes,CarlDjerassi,andGeorgeRosenkranzatSyntexinMexicoCityin1951.Itwastheprogestinusedinoneofthefirstthreeoralcontraceptives.Itsrelatedester,norethisteroneacetate,isusedforthesameindicati***COA:ProductnameNorethindroneAppearanceWhitecrystallinepowderWater¡Ü5%passAssay98.0~102.0%99.2%Lossondrying¡Ü0.5%0.15%Relatedsubstancestotalimpurities¡Ü1.0%Passanyindividualimpurity¡Ü0.5%PassResidualsolventsethanol¡Ü0.5%Passskype:edisonxu0907emailtracyatycphardotcom)