losartan and its Impurities
Losartan is used for hypertension, including in people with left ventricular hypertrophy and kidney dysfunction among type II diabetics. It is available as a generic medication. It may be used alone or in addition to other blood pressure medication. Reference standards of Losartan API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


4,4-Dimethyl-2-propyl-1-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-furo[3,4-d]imidazol-6(4H)-one
4,4-Dimethyl-2-propyl-1-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-furo[3,4-d]imidazol-6(4H)-one
Catalogue No.:PA 12 27590
CAS :
NA
Molecular Formula : C41H40N6O2
Molecular Weight : 648.8


4-(2-Hydroxypropan-2-yl)-2-propyl-1-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-imidazole-5-carboxylic Acid
4-(2-Hydroxypropan-2-yl)-2-propyl-1-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-imidazole-5-carboxylic Acid
Catalogue No.:PA 12 27600
CAS :
761404-85-7
Molecular Formula : C43H40N6O3
Molecular Weight : 688.82

![1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)met PA 12 28630](https://www.pharmaffiliates.com/pimages/PA1228630.jpg)
1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-5-chloro-1H-imidazole-4-carbaldehyde
1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-5-chloro-1H-imidazole-4-carbaldehyde
Catalogue No.:PA 12 28630
CAS :
141949-90-8
Molecular Formula : C22H21ClN6O
Molecular Weight : 420.89


Potassium 5-(4'-((2-butyl-5-chloro-4-(hydroxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)tetrazol-1-ide
Potassium 5-(4'-((2-butyl-5-chloro-4-(hydroxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)tetrazol-1-ide
Catalogue No.:PA 12 28650
CAS :
NA
Molecular Formula : C22H22ClKN6O
Molecular Weight : 461.01


Losartan Related Compound B (2-Butyl-4-chloro-(1-{[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1H-im (1370484)
Losartan Related Compound B (2-Butyl-4-chloro-(1-{[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1H-im (1370484)
Catalogue No.:PA USP1370484
CAS :
1006062-27-6
Molecular Formula : NA
Molecular Weight : NA


Losartan Related Compound C (2-Butyl-4-chloro-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-imi (1370495)
Losartan Related Compound C (2-Butyl-4-chloro-1-[[2'-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-imi (1370495)
Catalogue No.:PA USP1370495
CAS :
114798-36-6
Molecular Formula : NA
Molecular Weight : NA


Losartan Related Compound D (5-[4'-({2-Butyl-5-[(5-{4'-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidaz (1370509)
Losartan Related Compound D (5-[4'-({2-Butyl-5-[(5-{4'-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidaz (1370509)
Catalogue No.:PA USP1370509
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Losartan Related Compound E (5-[4'-({2-Butyl-5-[(5-{4'-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidaz (1370510)
Losartan Related Compound E (5-[4'-({2-Butyl-5-[(5-{4'-[(2-butyl-4-chloro-5-hydroxymethyl-1H-imidaz (1370510)
Catalogue No.:PA USP1370510
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA

![(1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)me PA 12 0271005](https://www.pharmaffiliates.com/pimages/PA120271005.jpg)
(1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-5-chloro-1H-imidazol-4-yl)methanamine
(1-((2'-(2H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-5-chloro-1H-imidazol-4-yl)methanamine
Catalogue No.:PA 12 0271005
CAS :
141949-91-9
Molecular Formula : C22H24ClN7
Molecular Weight : 421.93


4'-((5-(Azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
4'-((5-(Azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
Catalogue No.:PA 12 0271006
CAS :
2755908-48-4
Molecular Formula : C22H21ClN6
Molecular Weight : 404.9

![2-(1-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl) PA 12 0271007](https://www.pharmaffiliates.com/pimages/PA120271007.jpg)
2-(1-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-methyl-6-oxo-1,6-dihydropyrimidin-5-yl)acetic Acid
2-(1-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-methyl-6-oxo-1,6-dihydropyrimidin-5-yl)acetic Acid
Catalogue No.:PA 12 0271007
CAS :
178554-16-0
Molecular Formula : C25H26N6O3
Molecular Weight : 458.52


5-(4'-((2-(Azidomethyl)-5-butyl-3-chloro-1H-pyrrol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
5-(4'-((2-(Azidomethyl)-5-butyl-3-chloro-1H-pyrrol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
Catalogue No.:PA 12 0271008
CAS :
NA
Molecular Formula : C23H23ClN8
Molecular Weight : 446.94


4'-((5-(Azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carboxylic Acid
4'-((5-(Azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carboxylic Acid
Catalogue No.:PA 12 0271010
CAS :
NA
Molecular Formula : C22H22ClN5O2
Molecular Weight : 423.9


4'-((2-Butyl-5-chloro-4-(hydroxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
4'-((2-Butyl-5-chloro-4-(hydroxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
Catalogue No.:PA 12 0281003
CAS :
2204369-11-7
Molecular Formula : C22H22ClN3O
Molecular Weight : 379.89

![1-((1-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl PA 12 0271013](https://www.pharmaffiliates.com/pimages/PA120271013.jpg)
1-((1-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-5-(4'-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
1-((1-((2'-(1H-Tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-5-(4'-((5-(azidomethyl)-2-butyl-4-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
Catalogue No.:PA 12 0271013
CAS :
2755908-51-9
Molecular Formula : C44H43Cl2N15
Molecular Weight : 852.83


4'-((4-(Azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
4'-((4-(Azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-carbonitrile
Catalogue No.:PA 12 0271015
CAS :
2755908-49-5
Molecular Formula : C22H21ClN6
Molecular Weight : 404.9


5-(4'-((4-(Azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
5-(4'-((4-(Azidomethyl)-2-butyl-5-chloro-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole
Catalogue No.:PA 12 0271014
CAS :
2755908-50-8
Molecular Formula : C22H22ClN9
Molecular Weight : 447.93


(2-Butyl-5-chloro-1-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-imidazol-4-yl)methanol
(2-Butyl-5-chloro-1-((2'-(1-trityl-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H-imidazol-4-yl)methanol
Catalogue No.:PA 12 0271017
CAS :
133727-10-3
Molecular Formula : C41H37ClN6O
Molecular Weight : 665.24


5-(4'-((2-Butyl-4-chloro-5-(hydroxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazol-1-ol
5-(4'-((2-Butyl-4-chloro-5-(hydroxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazol-1-ol
Catalogue No.:PA 12 0271020
CAS :
2904682-23-9
Molecular Formula : C22H23ClN6O2
Molecular Weight : 438.92