Category
Levonorgestrel
CAS Number
Levonorgestrel STD-797-63-7: IMP-A-1260525-53-8; 110785-09-6 (Relative): IMP-H-55555-97-0: IMP-K-793-55-5: IMP-M-51087-61-7: IMP-O-155683-60-6: IMP-S-176254-10-7
Molecular Formula
Levonorgestrel STD-C21H28O2: IMP-A-C21H26O2: IMP-H-C21H28O3: IMP-K-C19H28O2: IMP-M-C21H26O2: IMP-O-C22H32O3: IMP-S-C22H30O2
Molecular Weight
Levonorgestrel STD-312.45: IMP-A-310.43: IMP-H-328.45: IMP-K-288.43: IMP-M-310.43: IMP-O-344.49: IMP-S-326.47
Synonym

Levonorgestrel STD-(17alpha)-13-Ethyl-17-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one; 13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one; (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one; Etonogestrel Impurity G (EP/BP); 17-Ethynyl-18-methyl-19-nortestosterone; (17α)-13-Ethyl-17-hydroxy -18,19-dinorpregn-4-en-20-yn-3-one; Levonorgestrel; D-Norgestrel; Dexnorgestrel; Levonelle; Levonova; Microlut; Microval; Norgeston; (8R,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one; 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, (17α)-(−)-; (−)-13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one (USP)

Levonorgestrel-EP-Impurity-A-(9R,10R,13S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,9,10,11,12,15,16-decahydrocyclopenta[a]phenanthren-3-one

Levonorgestrel-EP-Impurity-H-(6beta,17alpha)-13-Ethyl-6,17-dihydroxy-18,19-dinorpregn-4-en-20-yn-3-one

Levonorgestrel-EP-Impurity-K-(8R,9S,10R,14S,17S)-13-ethyl-17-hydroxy-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta(a)phenanthren-3(2H)-one

Levonorgestrel-EP-Impurity-M-18,19-Dinorpregna-4,6-dien-20-yn-3-one,13-ethyl-17-hydroxy-,(17alpha)

Levonorgestrel-EP-Impurity-O-(5R,8R,9S,10R,13S,14S,17S)-13-ethyl-17-ethynyl-17-hydroxy-5-methoxyhexadecahydro-3H-cyclopenta[a]phenanthren-3-one

Levonorgestrel-EP-Impurity-S-13-ethyl-3-methoxy-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol

slide.1

Levonorgestrel for System Suitability 1 CRS is a certified reference substance used in analytical laboratories to verify the performance of chromatographic systems. It ensures parameters like retention time, resolution, and peak shape are accurate, confirming that the system is suitable for reliable and reproducible analysis of levonorgestrel in pharmaceutical formulations.