letrozole and its Impurities

Letrozole is also used to help prevent the cancer from returning. Some breast cancers are made to grow faster by a natural hormone called estrogen. It is sold under the brand name Femara. Reference standards of Letrozole API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 23 results for letrozole Impurities
PA 12 53000

Letrozole

Letrozole

  • Catalogue No.:PA 12 53000

  • CAS :

    112809-51-5

  • Molecular Formula : C17H11N5

  • Molecular Weight : 285.30

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PA 12 53010

Letrozole - Impurity A

4,4'-(4H-1,2,4-Triazol-4-ylmethylene)dibenzonitrile

  • Catalogue No.:PA 12 53010

  • CAS :

    112809-52-6

  • Molecular Formula : C17H11N5

  • Molecular Weight : 285.30

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PA 12 53020

Letrozole - Impurity B

4,4',4''-Methanetriyltribenzonitrile

  • Catalogue No.:PA 12 53020

  • CAS :

    113402-31-6

  • Molecular Formula : C22H13N3

  • Molecular Weight : 319.36

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PA 12 53510

4,4'-Dicyanobenzophenone

4,4'-Dicyanobenzophenone

  • Catalogue No.:PA 12 53510

  • CAS :

    32446-66-5

  • Molecular Formula : C15H8N2O

  • Molecular Weight : 232.24

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PA 12 53520

4-Descyano-4-bromo-letrozole

4-Descyano-4-bromo-letrozole

  • Catalogue No.:PA 12 53520

  • CAS :

    143030-54-0

  • Molecular Formula : C16H11BrN4

  • Molecular Weight : 339.19

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PA 12 53530

4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile

4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile

  • Catalogue No.:PA 12 53530

  • CAS :

    112809-25-3

  • Molecular Formula : C10H8N4

  • Molecular Weight : 184.2

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PA STI 056360

Letrozole-d4 (major)

Letrozole-d4 (major)

  • Catalogue No.:PA STI 056360

  • CAS :

    1133712-96-5

  • Molecular Formula : C17H7D4N5

  • Molecular Weight : 289.33

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PA 12 53540

4-((4-Cyanophenyl)(1H-1,2,4-triazol-1-yl)methyl)benzoic Acid

4-((4-Cyanophenyl)(1H-1,2,4-triazol-1-yl)methyl)benzoic Acid

  • Catalogue No.:PA 12 53540

  • CAS :

    NA

  • Molecular Formula : C17H12N4O2

  • Molecular Weight : 304.31

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PA 12 53550

4,4'-((1H-1,2,4-Triazol-1-yl)methylene)dibenzoic Acid

4,4'-((1H-1,2,4-Triazol-1-yl)methylene)dibenzoic Acid

  • Catalogue No.:PA 12 53550

  • CAS :

    1644566-39-1

  • Molecular Formula : C17H13N3O4

  • Molecular Weight : 323.31

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PA 12 53560

Letrozole N-Oxide 1

Letrozole N-Oxide 1

  • Catalogue No.:PA 12 53560

  • CAS :

    NA

  • Molecular Formula : C17H11N5O

  • Molecular Weight : 301.31

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PA 12 53570

Letrozole N-Oxide

Letrozole N-Oxide

  • Catalogue No.:PA 12 53570

  • CAS :

    2982528-88-9

  • Molecular Formula : C17H11N5O

  • Molecular Weight : 301.31

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PA EPY0000685

Letrozole (Y0000685)

Letrozole (Y0000685)

  • Catalogue No.:PA EPY0000685

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA USP1356971

Letrozole (1356971)

Letrozole (1356971)

  • Catalogue No.:PA USP1356971

  • CAS :

    112809-51-5

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA USP1356982

Letrozole Related Compound A (4,4'-(1H-1,3,4-triazol-1-ylmethylene)dibenzonitrile) (1356982)

Letrozole Related Compound A (4,4'-(1H-1,3,4-triazol-1-ylmethylene)dibenzonitrile) (1356982)

  • Catalogue No.:PA USP1356982

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA 12 0531000

4-(4-Cyanobenzyl)-1,2,4-triazole

4-(4-Cyanobenzyl)-1,2,4-triazole

  • Catalogue No.:PA 12 0531000

  • CAS :

    112809-27-5

  • Molecular Formula : C10H8N4

  • Molecular Weight : 184.2

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PA 12 0531001

4,4'-((1H-1,2,4-Triazol-1-yl)methylene)dibenzamide

4,4'-((1H-1,2,4-Triazol-1-yl)methylene)dibenzamide

  • Catalogue No.:PA 12 0531001

  • CAS :

    2170106-13-3

  • Molecular Formula : C17H15N5O2

  • Molecular Weight : 321.34

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PA 12 0531002

Tris(4-cyanophenyl)methanol

Tris(4-cyanophenyl)methanol

  • Catalogue No.:PA 12 0531002

  • CAS :

    117678-98-5

  • Molecular Formula : C22H13N3O

  • Molecular Weight : 335.37

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PA IPRS 12 18

Letrozole (IPRS/12/18) -from IPC

Letrozole (IPRS/12/18) -from IPC

  • Catalogue No.:PA IPRS 12 18

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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PA 12 0531003

Letrozole Mono-Amide Impurity

Letrozole Mono-Amide Impurity

  • Catalogue No.:PA 12 0531003

  • CAS :

    2500927-47-7

  • Molecular Formula : C17H13N5O

  • Molecular Weight : 303.33

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PA 12 0531004

4-(Chloromethyl)benzonitrile

4-(Chloromethyl)benzonitrile

  • Catalogue No.:PA 12 0531004

  • CAS :

    874-86-2

  • Molecular Formula : C8H6ClN

  • Molecular Weight : 151.59

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PA 12 0531005

4,4'-Methylenedibenzonitrile

4,4'-Methylenedibenzonitrile

  • Catalogue No.:PA 12 0531005

  • CAS :

    10466-37-2

  • Molecular Formula : C15H10N2

  • Molecular Weight : 218.26

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PA 12 0531006

4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile Hydrochloride

4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile Hydrochloride

  • Catalogue No.:PA 12 0531006

  • CAS :

    112809-26-4

  • Molecular Formula : C10H9ClN4

  • Molecular Weight : 220.66

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PA IPRSL045

Letrozole (IPRSL045)

Letrozole (IPRSL045)

  • Catalogue No.:PA IPRSL045

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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CPHI INDIA- 28, 30 November