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 24 results for letrozole Impurities
Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
PA EPY0000685

Letrozole (Y0000685)

Letrozole (Y0000685)

  • Catalogue No.:PA EPY0000685

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA USP1356971

Letrozole (1356971)

Letrozole (1356971)

  • Catalogue No.:PA USP1356971

  • CAS :

    112809-51-5

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
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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Drug Reference Standards & Impurity Synthesis in India
PA IPRSL045

Letrozole (IPRSL045)

Letrozole (IPRSL045)

  • Catalogue No.:PA IPRSL045

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA EP Y0002184

Letrozole Impurity A (Y0002184)

Letrozole Impurity A (Y0002184)

  • Catalogue No.:PA EP Y0002184

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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