famotidine and its Impurities
Famotidine is a medicine used for the treatment of gastric ulcers, stomach acid production, heartburn and gastroesophageal reflux . It is a histamine H2 receptor antagonist and it is an over-the-counter drug. Reference standards of Famotidine API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


Famotidine Related Compound B (3,5-bis[2-[[[2-[(diaminomethylene)amino]thiazol-4-yl]methyl]sulphany (1269221)
Famotidine Related Compound B (3,5-bis[2-[[[2-[(diaminomethylene)amino]thiazol-4-yl]methyl]sulphany (1269221)
Catalogue No.:PA USP1269221
CAS :
89268-62-2
Molecular Formula : NA
Molecular Weight : NA


Famotidine Related Compound C (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylthio]-N-sulfamoylpro (1269232)
Famotidine Related Compound C (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylthio]-N-sulfamoylpro (1269232)
Catalogue No.:PA USP1269232
CAS :
76824-17-4
Molecular Formula : NA
Molecular Weight : NA


Famotidine Related Compound D (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylthio]propanamide) (1269243)
Famotidine Related Compound D (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylthio]propanamide) (1269243)
Catalogue No.:PA USP1269243
CAS :
76824-16-3
Molecular Formula : NA
Molecular Weight : NA


Famotidine Related Compound E (2,2'-[4,4'-disulfanediylbis(methylene)bis(thiazole-4,2-diyl)]diguani (1269254)
Famotidine Related Compound E (2,2'-[4,4'-disulfanediylbis(methylene)bis(thiazole-4,2-diyl)]diguani (1269254)
Catalogue No.:PA USP1269254
CAS :
129083-44-9
Molecular Formula : NA
Molecular Weight : NA


Famotidine Related Compound F (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylthio]propanoic acid) (1269265)
Famotidine Related Compound F (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylthio]propanoic acid) (1269265)
Catalogue No.:PA USP1269265
CAS :
107880-74-0
Molecular Formula : NA
Molecular Weight : NA


Famotidine Sulfoxide (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylsulfinyl]-N'-sulfamoylpropani (1269298)
Famotidine Sulfoxide (3-[[2-(diaminomethyleneamino)thiazol-4-yl]methylsulfinyl]-N'-sulfamoylpropani (1269298)
Catalogue No.:PA USP1269298
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


3-(((2-((Diaminomethylene)amino)thiazol-4-yl)methyl)sulfinyl)-N-sulfamoylpropanamide hydrochloride
3-(((2-((Diaminomethylene)amino)thiazol-4-yl)methyl)sulfinyl)-N-sulfamoylpropanamide hydrochloride
Catalogue No.:PA 06 0011003
CAS :
NA
Molecular Formula : C8H15ClN6O4S3
Molecular Weight : 390.88


1-(4-(((2-(3-(Hydroxymethyl)-1,1-dioxido-3,4-dihydro-2H-1,2,4,6-thiatriazin-5-yl)ethyl)thio)methyl)thiazol-2-yl)guanidine maleate
1-(4-(((2-(3-(Hydroxymethyl)-1,1-dioxido-3,4-dihydro-2H-1,2,4,6-thiatriazin-5-yl)ethyl)thio)methyl)thiazol-2-yl)guanidine maleate
Catalogue No.:PA 06 0011007
CAS :
2575516-75-3
Molecular Formula : C14H21N7O7S3
Molecular Weight : 495.54


2-(4-(((2-(1,1-Dioxido-5-phenyl-5,6-dihydro-2H-1,2,4,6-thiatriazin-3-yl)ethyl)thio)methyl)thiazol-2-yl)guanidine
2-(4-(((2-(1,1-Dioxido-5-phenyl-5,6-dihydro-2H-1,2,4,6-thiatriazin-3-yl)ethyl)thio)methyl)thiazol-2-yl)guanidine
Catalogue No.:PA 06 0011013
CAS :
NA
Molecular Formula : C15H19N7O2S3
Molecular Weight : 425.54