Famotidine-Impurities | Pharmaffiliates

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.

Displaying 63 results for famotidine Impurities
PA 06 01000

Famotidine - API

Famotidine


  • Catalogue No.:PA 06 01000

  • CAS :

    76824-35-6

  • Molecular Formula : C8H15N7O2S3

  • Molecular Weight : 337.45

PA 06 01010

Famotidine - Impurity A (Hydrochloride Salt)

3-[[[2-[(Diaminomethylene)amino]thiazol-4-yl]methyl]thio]propanimidamide Hydrochloride


  • Catalogue No.:PA 06 01010

  • CAS :

    76833-47-1

  • Molecular Formula : C8H15ClN6S2

  • Molecular Weight : 294.83

PA 06 01020

Famotidine - Impurity B

3,5-Bis[2-[[[2-[(diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]ethyl]-4H-1,2,4,6-thiatriazine 1,1-dioxide


  • Catalogue No.:PA 06 01020

  • CAS :

    89268-62-2

  • Molecular Formula : C16H23N11O2S5

  • Molecular Weight : 561.76

PA 06 01030

Famotidine - Impurity C

[3-[[[2-(Diaminomethyleneamino)-4-thiazolyl]methyl]thio]propionyl]sulfamide Hydrochloride


  • Catalogue No.:PA 06 01030

  • CAS :

    76824-17-4

  • Molecular Formula : C8H15ClN6O3S3

  • Molecular Weight : 374.89

PA 06 01031

Famotidine - Impurity C (Freebase)

[3-[[[2-(Diaminomethyleneamino)-4-thiazolyl]methyl]thio]propionyl]sulfamide


  • Catalogue No.:PA 06 01031

  • CAS :

    106433-44-7

  • Molecular Formula : C8H14N6O3S3

  • Molecular Weight : 338.43

PA 06 01040

Famotidine - Impurity D

3-[[[2-[(Diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]propanamide


  • Catalogue No.:PA 06 01040

  • CAS :

    76824-16-3

  • Molecular Formula : C8H13N5OS2

  • Molecular Weight : 259.35

PA 06 01050

Famotidine - Impurity E

2,2'-((Disulfanediylbis(methylene))bis(thiazole-4,2-diyl))diguanidine


  • Catalogue No.:PA 06 01050

  • CAS :

    129083-44-9

  • Molecular Formula : C10H14N8S4

  • Molecular Weight : 374.53

PA 06 01060

Famotidine - Impurity F

3-[[[2-[(Aminoiminomethyl)amino]-4-thiazolyl]methyl]thio]propanoic Acid;


  • Catalogue No.:PA 06 01060

  • CAS :

    107880-74-0

  • Molecular Formula : C8H12N4O2S2

  • Molecular Weight : 260.34

PA 06 01070

Famotidine - Impurity G

3-[[[2-[(Aminoiminomethyl)amino]-4-thiazolyl]methyl]thio]-N-cyanopropanimidamide


  • Catalogue No.:PA 06 01070

  • CAS :

    76823-97-7

  • Molecular Formula : C9H13N7S2

  • Molecular Weight : 283.38

PA 06 01090

Famotidine - Impurity I

3-[[[2-[(Aminoiminomethyl)amino]-4-thiazolyl]methyl]sulfinyl]-N-(aminosulfonyl)propanamide


  • Catalogue No.:PA 06 01090

  • CAS :

    1020719-36-1

  • Molecular Formula : C8H14N6O4S3

  • Molecular Weight : 354.43

PA 06 01510

3-[2-(Diaminomethyleneamino)-1,3-thiazol-4-ylmethylsulphinyl]-N-sulphamoylpropanamidine

3-[2-(Diaminomethyleneamino)-1,3-thiazol-4-ylmethylsulphinyl]-N-sulphamoylpropanamidine


  • Catalogue No.:PA 06 01510

  • CAS :

    90237-03-9

  • Molecular Formula : C8H15N7O3S3

  • Molecular Weight : 353.44

PA 06 01520

2-(4-(((2-Cyanoethyl)thio)methyl)thiazol-2-yl)guanidine

2-(4-(((2-Cyanoethyl)thio)methyl)thiazol-2-yl)guanidine


  • Catalogue No.:PA 06 01520

  • CAS :

    76823-93-3

  • Molecular Formula : C8H11N5S2

  • Molecular Weight : 241.34

PA 06 01530

Famotidine - Impurity D (Hydrochloride Salt)

3-[[[2-[(Diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]propanamide Hydrochloride


  • Catalogue No.:PA 06 01530

  • CAS :

    2469195-46-6

  • Molecular Formula : C8H14ClN5OS2

  • Molecular Weight : 295.81

PA 06 01540

Famotidine Acid Methyl Ester Acetic Acid Salt (Famotidine Impurity)

Famotidine Acid Methyl Ester Acetic Acid Salt (Famotidine Impurity)


  • Catalogue No.:PA 06 01540

  • CAS :

    1797135-07-9

  • Molecular Formula : C11H18N4O4S2

  • Molecular Weight : 334.42

PA 06 01550

S-(2-Guanidino-4-thiazolyl)methylisothiourea Dihydrochloride

S-(2-Guanidino-4-thiazolyl)methylisothiourea Dihydrochloride


  • Catalogue No.:PA 06 01550

  • CAS :

    88046-01-9

  • Molecular Formula : C6H12Cl2N6S2

  • Molecular Weight : 303.24

PA 06 01560

1-(4-Methylthiazol-2-yl)guanidine Hydrochloride

1-(4-Methylthiazol-2-yl)guanidine Hydrochloride


  • Catalogue No.:PA 06 01560

  • CAS :

    100599-91-5

  • Molecular Formula : C5H9ClN4S

  • Molecular Weight : 192.67

PA STI 040560

Famotidine-13C3

Famotidine-13C3


  • Catalogue No.:PA STI 040560

  • CAS :

    1185241-48-8

  • Molecular Formula : C513C3H15N7O2S3

  • Molecular Weight : 340.42

PA STI 040570

Famotidine-d4

Famotidine-d4


  • Catalogue No.:PA STI 040570

  • CAS :

    NA

  • Molecular Formula : C8H11D4N7O2S3

  • Molecular Weight : 341.47

PA STI 040580

Famotidine-13C,d4 Acid Impurity

Famotidine-13C,d4 Acid Impurity


  • Catalogue No.:PA STI 040580

  • CAS :

    1324230-60-5

  • Molecular Formula : C713CH8D4N4O2S2

  • Molecular Weight : 265.35

PAI 06 005010

Methyl 3-(((2-acetamidothiazol-4-yl)methyl)thio)propanimidate

Methyl 3-(((2-acetamidothiazol-4-yl)methyl)thio)propanimidate


  • Catalogue No.:PAI 06 005010

  • CAS :

    NA

  • Molecular Formula : C10H15N3O2S2

  • Molecular Weight : 273.38

PAI 06 005020

Dediaminosulfonyl Hydroxymethyl Famotidine

Dediaminosulfonyl Hydroxymethyl Famotidine


  • Catalogue No.:PAI 06 005020

  • CAS :

    76823-94-4

  • Molecular Formula : C9H15N5OS2

  • Molecular Weight : 273.38

PAI 06 005030

1-(4-(Chloromethyl)thiazol-2-yl)guanidine Hydrochloride

1-(4-(Chloromethyl)thiazol-2-yl)guanidine Hydrochloride


  • Catalogue No.:PAI 06 005030

  • CAS :

    69014-12-6

  • Molecular Formula : C5H8Cl2N4S

  • Molecular Weight : 227.11

PAI 06 005040

S-((2-Guanidinothiazol-4-yl)methyl) Ethanethioate

S-((2-Guanidinothiazol-4-yl)methyl) Ethanethioate


  • Catalogue No.:PAI 06 005040

  • CAS :

    NA

  • Molecular Formula : C7H10N4OS2

  • Molecular Weight : 230.31

PAI 06 005050

1-(4-(Mercaptomethyl)thiazol-2-yl)guanidine

1-(4-(Mercaptomethyl)thiazol-2-yl)guanidine


  • Catalogue No.:PAI 06 005050

  • CAS :

    95853-51-3

  • Molecular Formula : C5H8N4S2

  • Molecular Weight : 188.27

PA 06 01071

Famotidine - Impurity G (Maleate Salt)

N-Cyano-3-[[[2-[(diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]propanimidamide Maleate


  • Catalogue No.:PA 06 01071

  • CAS :

      NA

  • Molecular Formula : C13H17N7O4S2

  • Molecular Weight : 399.44

PA 06 01080

Famotidine - Impurity H

[2-[(Diaminomethylene)amino]thiazol-4-yl]methyl Carbamimidothioate


  • Catalogue No.:PA 06 01080

  • CAS :

    106649-96-1

  • Molecular Formula : C6H10N6S2

  • Molecular Weight : 230.31

PA 06 01100

Famotidine - Impurity J

Methyl 3-[[[2-[(diaminomethylene)amino]thiazol-4-yl]methyl]sulfanyl]propanoate


  • Catalogue No.:PA 06 01100

  • CAS :

    76824-14-1

  • Molecular Formula : C9H14N4O2S2

  • Molecular Weight : 274.36

PA EPF0005000

Famotidine (F0005000)

Famotidine (F0005000)


  • Catalogue No.:PA EPF0005000

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA IPIPRS 29 11

Famotidine (IPRS/29/11)-from IPC


  • Catalogue No.:PA IPIPRS 29 11

  • CAS :

    NA

  • Molecular Formula :

  • Molecular Weight : NA

PA EPY0000382

Famotidine for system suitability (Y0000382)

Famotidine for system suitability (Y0000382)


  • Catalogue No.:PA EPY0000382

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000409

Famotidine impurity D (Y0000409)

Famotidine impurity D (Y0000409)


  • Catalogue No.:PA EPY0000409

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1269200

Famotidine (1269200)

Famotidine (1269200)


  • Catalogue No.:PA USP1269200

  • CAS :

    76824-35-6

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1269221

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

PA USP1269232

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

PA USP1269243

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

PA USP1269254

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

PA USP1269265

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

PA USP1269298

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

PA BP653RB

famotidine (653RB)

famotidine (653RB)


  • Catalogue No.:PA BP653RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA BP654RB

Famotidine impurity C (654RB)

Famotidine impurity C (654RB)


  • Catalogue No.:PA BP654RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA BP655RB

famotidine degradation impurity 1 (655RB)

famotidine degradation impurity 1 (655RB)


  • Catalogue No.:PA BP655RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA BP656RB

famotidine degradation impurity 2 (656RB)

famotidine degradation impurity 2 (656RB)


  • Catalogue No.:PA BP656RB

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA 06 01011

Famotidine - Impurity A (Freebase)

3-[[[2-[(Diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]propanimidamide


  • Catalogue No.:PA 06 01011

  • CAS :

    124646-10-2

  • Molecular Formula : C8H14N6S2

  • Molecular Weight : 258.36

PA 06 0011000

Famotidine - Impurity A (Dihydrochloride Salt)

Famotidine Dihydrochloride


  • Catalogue No.:PA 06 0011000

  • CAS :

    88061-72-7

  • Molecular Formula : C8H16Cl2N6S2

  • Molecular Weight : 331.28

PA 06 01072

Famotidine - Impurity G (Hydrochloride Salt)

N-Cyano-3-[[[2-[(diaminomethylidene)amino]thiazol-4-yl]methyl]sulfanyl]propanimidamide Hydrochloride


  • Catalogue No.:PA 06 01072

  • CAS :

    NA

  • Molecular Formula : C9H14ClN7S2

  • Molecular Weight : 319.83

PA 06 0011002

1-(4-(Chloromethyl)thiazol-2-yl)guanidine

1-(4-(Chloromethyl)thiazol-2-yl)guanidine


  • Catalogue No.:PA 06 0011002

  • CAS :

    81152-53-6

  • Molecular Formula : C5H7ClN4S

  • Molecular Weight : 190.65

PA 06 0011003

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

PA 06 0011001

N-(Aminosulfonyl)-3-chloropropanamide

N-(Aminosulfonyl)-3-chloropropanamide


  • Catalogue No.:PA 06 0011001

  • CAS :

    88068-99-9

  • Molecular Formula : C3H7ClN2O3S

  • Molecular Weight : 186.61

PA 06 0011005

N-Sulphamyl-3-chloropropionamidine Hydrochloride

N-Sulphamyl-3-chloropropionamidine Hydrochloride


  • Catalogue No.:PA 06 0011005

  • CAS :

    106649-95-0

  • Molecular Formula : C3H9Cl2N3O2S

  • Molecular Weight : 222.08

PA 06 0011004

N-Nitroso Famotidine - I

N-Nitroso Famotidine - I


  • Catalogue No.:PA 06 0011004

  • CAS :

    NA

  • Molecular Formula : C8H14N8O3S3

  • Molecular Weight : 366.43

PAI 06 005051

Ethyl 3-(((2-((diaminomethylene)amino)thiazol-4-yl)methyl)thio)propanimidate

Ethyl 3-(((2-((diaminomethylene)amino)thiazol-4-yl)methyl)thio)propanimidate


  • Catalogue No.:PAI 06 005051

  • CAS :

    NA

  • Molecular Formula : C10H17N5OS2

  • Molecular Weight : 287.4

PA 06 0011006

1-(4-(Chloromethyl)-4-hydroxy-4,5-dihydrothiazol-2-yl)guanidine

1-(4-(Chloromethyl)-4-hydroxy-4,5-dihydrothiazol-2-yl)guanidine


  • Catalogue No.:PA 06 0011006

  • CAS :

    95907-34-9

  • Molecular Formula : C5H9ClN4OS

  • Molecular Weight : 208.66

PA 06 0011008

3,5-bis(2-Chloroethyl)-4H-1,2,4,6-thiatriazine 1,1-dioxide

3,5-bis(2-Chloroethyl)-4H-1,2,4,6-thiatriazine 1,1-dioxide


  • Catalogue No.:PA 06 0011008

  • CAS :

    NA

  • Molecular Formula : C6H9Cl2N3O2S

  • Molecular Weight : 258.12

PA 06 0011007

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

PA STI 089065

Famotidine-13C-d3

Famotidine-13C-d3


  • Catalogue No.:PA STI 089065

  • CAS :

    NA

  • Molecular Formula : C713CH12D3N7O2S3

  • Molecular Weight : 341.45

PA 06 0011009

N-Sulfamoylacrylimidamide

N-Sulfamoylacrylimidamide


  • Catalogue No.:PA 06 0011009

  • CAS :

    95853-46-6

  • Molecular Formula : C3H7N3O2S

  • Molecular Weight : 149.17

PA 06 0011010

(2-Aminothiazol-4-yl)methyl Carbamimidothioate

(2-Aminothiazol-4-yl)methyl Carbamimidothioate


  • Catalogue No.:PA 06 0011010

  • CAS :

    20166-91-0

  • Molecular Formula : C5H8N4S2

  • Molecular Weight : 188.27

PA 06 0011011

1-((2-Guanidinothiazol-4-yl)methyl)thiourea

1-((2-Guanidinothiazol-4-yl)methyl)thiourea


  • Catalogue No.:PA 06 0011011

  • CAS :

    NA

  • Molecular Formula : C6H10N6S2

  • Molecular Weight : 230.31

PA 06 0011012

N-(N-Benzylidenesulfamoyl)-3-(((2-guanidinothiazol-4-yl)methyl)thio)propanimidamide

N-(N-Benzylidenesulfamoyl)-3-(((2-guanidinothiazol-4-yl)methyl)thio)propanimidamide


  • Catalogue No.:PA 06 0011012

  • CAS :

    1994267-84-3

  • Molecular Formula : C15H19N7O2S3

  • Molecular Weight : 425.54

PA 06 0011013

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

PA 06 0011014

N-Nitroso Famotidine 2

N-Nitroso Famotidine 2


  • Catalogue No.:PA 06 0011014

  • CAS :

    NA

  • Molecular Formula : C8H14N8O3S3

  • Molecular Weight : 366.43

PA 06 0011015

1-(4-(Chloromethyl)-4-hydroxy-4,5-dihydrothiazol-2-yl)guanidine Hydrochloride

1-(4-(Chloromethyl)-4-hydroxy-4,5-dihydrothiazol-2-yl)guanidine Hydrochloride


  • Catalogue No.:PA 06 0011015

  • CAS :

    95907-33-8

  • Molecular Formula : C5H10Cl2N4OS

  • Molecular Weight : 245.12

PA 06 0011016

N-Sulphamyl-3-chloropropionamidine

N-Sulphamyl-3-chloropropionamidine


  • Catalogue No.:PA 06 0011016

  • CAS :

    106492-70-0

  • Molecular Formula : C3H8ClN3O2S

  • Molecular Weight : 185.63