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Pharmaceutical Impurity Reference Standards

Process impurities, degradation products and genotoxic impurity reference standards with full characterization.

O-Butyl Dabigatran Ethyl Ester (Dabigatran Impurity) structure

O-Butyl Dabigatran Ethyl Ester (Dabigatran Impurity)

CAS: 1416446-43-9

In Stock97%+

Dabigatran Impurity N1 structure

Dabigatran Impurity N1

CAS: 1416446-45-1

In Stock97%+

Trimipramine Maleate EP Impurity A structure

Trimipramine Maleate EP Impurity A

CAS: 14171-70-1

In Stock97%+

Glutamic Acid Impurity 4 structure

Glutamic Acid Impurity 4

CAS: 1417526-05-6

In Stock97%+

Dimenhydrinate Impurity 6 structure

Dimenhydrinate Impurity 6

CAS: 14177-81-2

In Stock97%+

Butenafine Impurity 31 structure

Butenafine Impurity 31

CAS: 141788-33-2

In Stock97%+

Lenacapavir Impurity N1 structure

Lenacapavir Impurity N1

CAS: 1417983-07-3

In Stock97%+

Chlorothalonil Impurity 1 structure

Chlorothalonil Impurity 1

CAS: 1418095-02-9

In Stock97%+

Ciclesonide EP Impurity A structure

Ciclesonide EP Impurity A

CAS: 141845-81-0

In Stock97%+

Telbivudine Impurity 3 structure

Telbivudine Impurity 3

CAS: 141846-57-3

In Stock97%+

Tezacaftor Impurity C34 structure

Tezacaftor Impurity C34

CAS: 1419101-35-1

In Stock97%+

AlachlorImpurity 3 structure

AlachlorImpurity 3

CAS: 141949-10-2

In Stock97%+

Arginine Impurity 3 structure

Arginine Impurity 3

CAS: 1419723-92-4

In Stock97%+

Etilefrine Impurity 12 structure

Etilefrine Impurity 12

CAS: 1420-80-0

In Stock97%+

Sorbic Acid Impurity 2 structure

Sorbic Acid Impurity 2

CAS: 14202-27-8

In Stock97%+

Axitinib Impurity N1 structure

Axitinib Impurity N1

CAS: 1420478-90-5

In Stock97%+

Nifedipine Impurity N1 structure

Nifedipine Impurity N1

CAS: 14205-42-6

In Stock97%+

Etoricoxib Impurity 5 Lithium Salt structure

Etoricoxib Impurity 5 Lithium Salt

CAS: 1421227-96-4

In Stock97%+

Fosinopril Impurity 2 structure

Fosinopril Impurity 2

CAS: 1421283-57-9

In Stock97%+

Gestodene EP Impurity G (Gestodene Aromate) structure

Gestodene EP Impurity G (Gestodene Aromate)

CAS: 1421283-59-1

In Stock97%+

Gestodene EP Impurity K (Aromatic 6-Keto Gestodene) structure

Gestodene EP Impurity K (Aromatic 6-Keto Gestodene)

CAS: 1421283-61-5

In Stock97%+

Roxadustat Impurity N4 structure

Roxadustat Impurity N4

CAS: 1421312-33-5

In Stock97%+

Osimertinib Impurity N1 structure

Osimertinib Impurity N1

CAS: 1421372-67-9

In Stock97%+

Osimertinib Impurity N2 structure

Osimertinib Impurity N2

CAS: 1421373-36-5 (free base)

In Stock97%+

Osimertinib Impurity N3 structure

Osimertinib Impurity N3

CAS: 1421373-99-0

In Stock97%+

Montelukast Dihydro Impurity (Sodium Salt) structure

Montelukast Dihydro Impurity (Sodium Salt)

CAS: 142147-98-6

In Stock97%+

Clofarabine Impurity 5 structure

Clofarabine Impurity 5

CAS: 14215-97-5

In Stock97%+

Norethindrone Impurity 27 structure

Norethindrone Impurity 27

CAS: 142154-46-9

In Stock97%+

Acetylsalicylic Acid Impurity 14 structure

Acetylsalicylic Acid Impurity 14

CAS: 14216-33-2

In Stock97%+

Selinexor Impurity 9 structure

Selinexor Impurity 9

CAS: 1421923-96-7

In Stock97%+

Acedoben Impurity 11 structure

Acedoben Impurity 11

CAS: 142225-84-1

In Stock97%+

Ketorolac Impurity 23 structure

Ketorolac Impurity 23

CAS: 142231-06-9

In Stock97%+

Dabigatran Impurity N2 structure

Dabigatran Impurity N2

CAS: 1422435-39-9

In Stock97%+

Fluralaner Impurity N6 structure

Fluralaner Impurity N6

CAS: 1352242-94-4

In Stock97%+

(3aS,12bR)-5-chloro-2-methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole structure

(3aS,12bR)-5-chloro-2-methyl-2,3,3a,12b-tetrahydro-1H-dibenzo[2,3:6,7]oxepino[4,5-c]pyrrole

CAS: 1422571-39-8

In Stock97%+

Candesartan Impurity 6 structure

Candesartan Impurity 6

CAS: 142269-40-7

In Stock97%+

Brexpiprazole impurity 01 structure

Brexpiprazole impurity 01

CAS: 1423-61-6

In Stock97%+

Nintedanib Impurity 83 structure

Nintedanib Impurity 83

CAS: 14235-05-3

In Stock97%+

Phenylephrine Impurity 29 structure

Phenylephrine Impurity 29

CAS: 14235-78-0

In Stock97%+

Tirofiban Impurity 56 structure

Tirofiban Impurity 56

CAS: 142355-80-4

In Stock97%+

Tirofiban Impurity 53 structure

Tirofiban Impurity 53

CAS: 142355-83-7

In Stock97%+

Dimethachlon Impurity 2 structure

Dimethachlon Impurity 2

CAS: 142408-21-7

In Stock97%+

Toxaphene Impurity 1 structure

Toxaphene Impurity 1

CAS: 142534-71-2

In Stock97%+

Talazoparib Impurity N57 structure

Talazoparib Impurity N57

CAS: 1425767-92-5

In Stock97%+

Goserelin Impurity N36 structure

Goserelin Impurity N36

CAS: 1426173-74-1

In Stock97%+

Vericiguat Impurity N dihydrochloride structure

Vericiguat Impurity N dihydrochloride

CAS: 1426309-48-9

In Stock97%+

Alendronate EP Impurity B structure

Alendronate EP Impurity B

CAS: 14265-44-2

In Stock97%+

Ribavirin Impurity 24 HCl structure

Ribavirin Impurity 24 HCl

CAS: 142782-22-7

In Stock97%+

16-Dehydro Pregnenolone Acetate Impurity 10 structure

16-Dehydro Pregnenolone Acetate Impurity 10

CAS: 14279-42-6

In Stock97%+

Oxandrolone Impurity 8 structure

Oxandrolone Impurity 8

CAS: 142793-21-3

In Stock97%+

Vortioxetine Impurity 72 DiHCl structure

Vortioxetine Impurity 72 DiHCl

CAS: 1428-92-8

In Stock97%+

Posaconazole Impurity 66 structure

Posaconazole Impurity 66

CAS: 1428118-25-5

In Stock97%+

Atorvastatin EP Impurity E Sodium Salt (Atorvastatin USP Related Compound E Sodium Salt, ent-Atorvastatin Sodium Salt) structure

Atorvastatin EP Impurity E Sodium Salt (Atorvastatin USP Related Compound E Sodium Salt, ent-Atorvastatin Sodium Salt)

CAS: 1428118-38-0

In Stock97%+

Gemcitabine Impurity 31 structure

Gemcitabine Impurity 31

CAS: 142816-70-4

In Stock97%+

Crizotinib Impurity 21 structure

Crizotinib Impurity 21

CAS: 1428476-86-1

In Stock97%+

Fesoterodine Impurity 7 structure

Fesoterodine Impurity 7

CAS: 1428856-47-6

In Stock97%+

Rivaroxaban Impurity 41 structure

Rivaroxaban Impurity 41

CAS: 142910-02-9

In Stock97%+

Diltiazem Impurity N3 HCl structure

Diltiazem Impurity N3 HCl

CAS: 142926-11-2

In Stock>95%

Darifenacin Impurity 9 structure

Darifenacin Impurity 9

CAS: 142935-60-2

In Stock97%+

Valaciclovir EP Impurity R structure

Valaciclovir EP Impurity R

CAS: 142963-59-5

In Stock97%+

Valaciclovir Impurity 1 structure

Valaciclovir Impurity 1

CAS: 142963-69-7

In Stock97%+

Tucatinib Impurity 4 structure

Tucatinib Impurity 4

CAS: 1429755-58-7

In Stock97%+

Saxagliptin Impurity N2 structure

Saxagliptin Impurity N2

CAS: 1429782-93-3

In Stock97%+

Solifenacin Impurity 13 structure

Solifenacin Impurity 13

CAS: 142999-60-8

In Stock97%+

Glipizide Nitroso Impurity 1 structure

Glipizide Nitroso Impurity 1

CAS: 14300-08-4

In Stock97%+

Tetrabenazine Impurity 3 structure

Tetrabenazine Impurity 3

CAS: 14301-36-1

In Stock97%+

Esomeprazole Impurity 13 structure

Esomeprazole Impurity 13

CAS: 143016-67-5

In Stock97%+

Palbociclib Impurity 55 structure

Palbociclib Impurity 55

CAS: 1430196-98-7

In Stock97%+

Minodronic Acid Impurity 23 structure

Minodronic Acid Impurity 23

CAS: 14305-17-0

In Stock97%+

Sitafloxacin Impurity 60 structure

Sitafloxacin Impurity 60

CAS: 143062-84-4

In Stock97%+

SDB-006 Impurity 2 (SDB-006 N-phenyl Analog) structure

SDB-006 Impurity 2 (SDB-006 N-phenyl Analog)

CAS: 1430634-87-9

In Stock97%+

Norepinephrine Impurity 27 structure

Norepinephrine Impurity 27

CAS: 14309-96-7

In Stock97%+

Valproic Acid Impurity 72 structure

Valproic Acid Impurity 72

CAS: 143100-15-6

In Stock97%+

Gemcitabine Impurity 11 structure

Gemcitabine Impurity 11

CAS: 143157-25-9

In Stock97%+

Gemcitabine Impurity 30 structure

Gemcitabine Impurity 30

CAS: 143157-27-1

In Stock97%+

Epalrestat Impurity 21 structure

Epalrestat Impurity 21

CAS: 1431637-29-4

In Stock97%+

Acebutolol EP Impurity E structure

Acebutolol EP Impurity E

CAS: 1432053-72-9

In Stock97%+

Loratadine Impurity 52 structure

Loratadine Impurity 52

CAS: 1432057-93-6

In Stock97%+

Darunavir impurity 14, 98% structure

Darunavir impurity 14, 98%

CAS: 143224-62-8

In Stock97%+

Gemcitabine impurity 22 structure

Gemcitabine impurity 22

CAS: 143234-90-6

In Stock97%+

Ondansetron Impurity 5 structure

Ondansetron Impurity 5

CAS: 1432682-04-6

In Stock97%+

Eletriptan Impurity 8 structure

Eletriptan Impurity 8

CAS: 143322-55-8

In Stock97%+

Apixaban Impurity 17 structure

Apixaban Impurity 17

CAS: 1434050-55-1

In Stock97%+

Carfilzomib Impurity 28 structure

Carfilzomib Impurity 28

CAS: 143415-51-4

In Stock97%+

Irbesartan - Impurity B structure

Irbesartan - Impurity B

CAS: 14343-69-2

In Stock97%+

Metronidazole Impurity 24 structure

Metronidazole Impurity 24

CAS: 143508-97-8

In Stock97%+

Sunitinib Impurity 43 structure

Sunitinib Impurity 43

CAS: 14352-65-9

In Stock97%+

Desloratadine 8-Bromo-11-Oxo Impurity structure

Desloratadine 8-Bromo-11-Oxo Impurity

CAS: 143540-56-1

In Stock97%+

Cabazitaxel Impurity 24 ( (2R,3S)-3-Amino-2-hydroxy-3-phenylpropionic Acid Ethyl Ester) structure

Cabazitaxel Impurity 24 ( (2R,3S)-3-Amino-2-hydroxy-3-phenylpropionic Acid Ethyl Ester)

CAS: 143615-00-3

In Stock97%+

Arformoterol Impurity 29 structure

Arformoterol Impurity 29

CAS: 143687-23-4

In Stock97%+

Tetrabenazine Impurity 32 structure

Tetrabenazine Impurity 32

CAS: 143743-98-0

In Stock97%+

Emtricitabine Impurity N1 structure

Emtricitabine Impurity N1

CAS: 143790-05-0

In Stock>95%

Methotrexate Impurity 11 structure

Methotrexate Impurity 11

CAS: 143873-72-7

In Stock97%+

Salmeterol Impurity structure

Salmeterol Impurity

CAS: 14389-87-8

In Stock97%+

rac-Anabasine DiHCl (rac-Nicotine EP Impurity G DiHCl) structure

rac-Anabasine DiHCl (rac-Nicotine EP Impurity G DiHCl)

CAS: 143924-48-5

In Stock97%+

Dapagliflozin Impurity 59 structure

Dapagliflozin Impurity 59

CAS: 14396-73-7

In Stock97%+

Isotretinoin Impurity 11 structure

Isotretinoin Impurity 11

CAS: 14398-42-6

In Stock97%+

Pyrazine Impurity 3 HCl (3-Methylpyridine HCl) structure

Pyrazine Impurity 3 HCl (3-Methylpyridine HCl)

CAS: 14401-92-4

In Stock97%+

Rizatriptan EP Impurity I structure

Rizatriptan EP Impurity I

CAS: 144034-84-4

In Stock97%+

Rizatriptan impurity 20 Oxalate structure

Rizatriptan impurity 20 Oxalate

CAS: 144035-23-4 (free base)

In Stock97%+

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