Category
Levonorgestrel
CAS Number
19914-67-1
Molecular Formula
C21H28O2
Molecular Weight
312.45
Purity

Not less than-95.0%

Synonym

13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one; 13-Ethyl-17α-ethynyl-17-hydroxygon-5(10)-en-3-one; (17α)-13-Ethyl-17-hydroxy-18,19-dinorpregn-5(10)-en-20-yn-3-one; Levonorgestrel-5(10)-ene isomer; 13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one (As per USP Commenting Opening 51(3)); 13-Ethyl-17alpha-ethynyl-17-hydroxygon-5(10)-en-3-one

Keywords
Fine Chemicals
Intermediates
Pharmaceutical Standards
Impurities
Levonorgestrel EP Impurity B

Levonorgestrel EP Impurity B is an official impurity listed in the European Pharmacopoeia for levonorgestrel. It is used as a reference standard in analytical method development, impurity profiling, and stability testing. Monitoring this impurity helps ensure the purity, safety, and regulatory compliance of levonorgestrel drug substances and formulations.